CIENA CORP
PRE 14A, 2000-01-28
TELEPHONE & TELEGRAPH APPARATUS
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                            SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
                               (Amendment No. __)

Filed by the Registrant |X|

Filed by a Party other than the Registrant |_|

Check the appropriate box:

|X| Preliminary Proxy Statement
|_| Confidential, for Use of the Commission Only
    (as permitted by Rule 14a-6(e)(2)
|_| Definitive Proxy Statement
|_| Definitive Additional Materials
|_| Soliciting Material Pursuant to ss.240.14a-11(c) or ss.240.14a-12

                               CIENA Corporation
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

                               CIENA Corporation
- --------------------------------------------------------------------------------
                   (Name of Person(s) Filing Proxy Statement)

Payment of Filing Fee (Check the appropriate box):

|X| No Fee Required

|_| Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

    1. Title of each class of securities to which transaction applies:

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    2. Aggregate number of securities to which transaction applies:

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    3. Per unit price or other underlying value of transaction computed pursuant
       to Exchange Act Rule 0-11(1)

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    4. Proposed maximum aggregate value transaction:

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    5. Total fee paid:

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(1)    Set forth the amount on which the filing fee is calculated and state how
       it was determined):

|_| Fee paid previously with preliminary materials.

|_| Check box if any part of the fee is offset as provided by Exchange Act
    Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
    paid previously. Identify the previous filing by registration number, or the
    Form or Schedule and the date of its filing.

    1. Amount previously paid:

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Notes:
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<PAGE>

                                     [LOGO]

                                CIENA CORPORATION
                               1201 Winterson Road
                            Linthicum, Maryland 21090

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

      The 2000 Annual Meeting of Stockholders of CIENA Corporation will be held
at the BWI Marriott, 1743 W. Nursery Road, Baltimore, Maryland, on Thursday,
March 16, 2000 at 3:00 p.m. for the following purposes:

      1. To elect two Class III directors.

      2. To adopt the Third Amended and Restated CIENA Corporation 1994 Stock
Option Plan.

      3. To amend the Corporation's Third Restated Certificate of Incorporation
to increase the number of shares of Common Stock authorized for issuance
thereunder from 360 million shares to 460 million shares.

      4. To ratify the selection of PricewaterhouseCoopers LLP as independent
public accountants for the Corporation.

      5. To consider and act upon such other business as may properly come
before the meeting.

      Whether or not you expect to attend the meeting, please sign, date and
return the enclosed proxy as promptly as possible in the enclosed stamped
envelope.

                                             By Order of the Board of Directors


                                             /s/ Michael O. McCarthy III

                                             Michael O. McCarthy III
                                             Secretary

Linthicum, Maryland
February 8, 2000
<PAGE>

                                 PROXY STATEMENT

                         Annual Meeting of Stockholders

                                 March 16, 2000

      This Proxy Statement will be furnished on or about February 8, 2000 to
stockholders of CIENA Corporation (the "Corporation"), 1201 Winterson Road,
Linthicum, Maryland 21090, in connection with the solicitation by the Board of
Directors of the Corporation of proxies to be voted at the Annual Meeting of
Stockholders. The stockholder giving the proxy has the power to revoke the proxy
at any time before it is exercised. Such right of revocation is not limited by
or subject to compliance with any formal procedures.

      The Corporation will bear the cost of soliciting proxies. Copies of
solicitation material may be furnished to brokers, custodians, nominees and
other fiduciaries for forwarding to beneficial owners of shares of the
Corporation's Common Stock, and normal handling charges may be paid for such
forwarding service. Officers and other management employees of the Corporation,
who will receive no additional compensation for their services, may solicit
proxies by mail, personal interview, telephone and telegraph.

      At the close of business on January 13, 2000, there were 139,339,284
shares of the Common Stock of the Corporation outstanding and entitled to vote
at the meeting. There were 1,543 record holders as of January 13, 2000 and only
stockholders of record on that date will be entitled to vote at the meeting.
Each share will have one vote.

                                   PROPOSAL 1

                              Election of Directors

General

      The Board of Directors currently consists of seven members. The directors
are divided into three classes, each class serving for a staggered three-year
term. Each class contains two Directors. Class I, whose term expires in 2001,
consists of Mr. Dillon and Dr. Nettles; Class II, whose term expires in 2002,
consists of Messrs. Cash and Zak; and Class III, whose term expires at the
Annual Meeting, consists of Professor Bradley and Messrs. Taylor and Oliver. At
the Annual Meeting, two directors will be elected to fill positions in Class
III. Professor Bradley and Mr. Taylor are nominees for election at the meeting.
Mr. Oliver is retiring as a director at the end of his term, which expires on
the date of the meeting. Each of the nominees for Class III, if elected, will
serve for terms expiring at the 2003 annual meeting of stockholders.

      Unless otherwise instructed on the proxy, it is the intention of the
persons named in the proxy to vote the shares represented by each properly
executed proxy for the election as directors of the persons named below as
nominees. The Board of Directors believes that all such nominees will stand for
election and will serve if elected. However, if any of the persons nominated by
the Board of Directors fails to stand for election or is unable to accept
election, proxies will be voted by the proxy holders for the election of such
other person or persons as the Board of Directors may recommend.

      The following table presents information concerning persons nominated for
election as directors of the Corporation and for those directors whose terms of
office will continue after the meeting.
<PAGE>

Nominees for Election as a Director for Terms Expiring in 2003

Stephen P. Bradley, Ph.D. ... Director of the Corporation since April 1998.
                              Professor Bradley, age 58, is a William Ziegler
                              Professor of Business Administration and the
                              Chairman of the Program for Management Development
                              at the Harvard Business School. A member of the
                              Harvard faculty since 1968, Professor Bradley is
                              also Chairman of Harvard's Executive Program in
                              Competition and Strategy and teaches in Harvard's
                              Delivering Information Services program. Professor
                              Bradley has written extensively on the
                              telecommunications industry and the impact of
                              technology on competitive strategy. Professor
                              Bradley received his B.E. in electrical
                              engineering from Yale University in 1963 and his
                              M.S. and Ph.D. in operations research from the
                              University of California, Berkeley, in 1965 and
                              1968 respectively. Professor Bradley serves on the
                              Audit Committee of the Board of Directors.

Gerald H. Taylor ............ Director of the Corporation since January 2000.
                              Mr. Taylor, age 57, has been a private consultant
                              and investor in the telecommunications industry
                              since November 1998. He served as Chief Executive
                              Officer of MCI Communications from November 1996
                              to November 1998 and was President and Chief
                              Operating Officer from July 1994 to November 1996.
                              Mr. Taylor was a member of the Board of Directors
                              of MCI Worldcom Inc. from 1998 to 1999. He
                              currently serves on the Boards of Lafarge
                              Corporation, E2Enet, Inc. and Voyager.net. Mr.
                              Taylor was Chief Operating Officer of MCI from
                              April 1993 to November 1996. Taylor joined MCI in
                              1969 as its sixth employee and was integrally
                              involved in building MCI through key roles held in
                              operations, sales and marketing.

Directors Continuing in Office

Patrick H. Nettles, Ph.D. ... Chief Executive Officer of the Corporation since
                              February 1994, President and Chief Executive
                              Officer of the Corporation since April 1994 and
                              Director of the Corporation since February 1994.
                              From 1992 until 1994, Dr. Nettles, age 56, served
                              as Executive Vice President and Chief Operating
                              Officer of Blyth Holdings Inc., a publicly-held
                              supplier of client/server software. From late 1990
                              through 1992, Dr. Nettles was President and Chief
                              Executive Officer of Protocol Engines Inc., a
                              development stage enterprise, formed as an
                              outgrowth of Silicon Graphics Inc., and targeted
                              toward very large scale integration-based
                              solutions for high-performance computer
                              networking. From 1989 to 1990, Dr. Nettles was
                              Chief Financial Officer of Optilink, a venture
                              start-up which was acquired by DSC Communications.
                              Dr. Nettles received his B.S. degree from the
                              Georgia Institute of Technology and his Ph.D. from
                              the California Institute of Technology. Dr.
                              Nettles' term as Director expires 2001.


                                       2
<PAGE>

John R. Dillon .............. Director of the Corporation since October 1999.
                              Mr. Dillon, age 58, has held a variety of
                              positions at such companies as the Coca-Cola
                              Company, Scientific Atlanta and Fuqua National,
                              where he served as President. Mr. Dillon joined
                              Cox Communications in 1981. He was instrumental in
                              taking it private in 1985 and merging it with Cox
                              Newspapers to form Cox Enterprises at which time
                              he was elected Senior Vice President, CFO and a
                              member of the board of directors. At Cox
                              Enterprises, he was responsible for all corporate
                              financial activities as well as planning and
                              development, until his retirement in December
                              1996. He continued to serve on the Boards of TCG
                              and Cox Communications for two years following his
                              retirement from Cox Enterprises. Mr. Dillon holds
                              an M.B.A. from Harvard Business School and a
                              B.E.E. degree from Georgia Institute of
                              Technology, where he was elected to the Academy of
                              Distinguished Engineering Alumni in 1997. He was a
                              founding director of the Georgia Center for
                              Advanced Telecommunications Technology and
                              currently serves on the Georgia Institute of
                              Technology National Advisory Board. Mr. Dillon
                              serves on the Audit Committee of the Board of
                              Directors. Mr. Dillon's term as Director expires
                              in 2001.

Harvey B. Cash .............. Director of the Corporation since April 1994. Mr.
                              Cash, age 61, is a general partner of InterWest
                              Partners, a venture capital firm in Menlo Park,
                              California which he joined in 1985. Mr. Cash
                              serves on the board of directors of Liberte, Inc.,
                              PANJA Corporation, and i2 Technologies Inc. He is
                              also an advisor to Austin Ventures. Mr. Cash
                              received a B.S. in electrical engineering from
                              Texas A&M University and an M.B.A. from Western
                              Michigan University. Mr. Cash serves on the Human
                              Resources and Corporate Governance Committees of
                              the Board of Directors. Mr. Cash's term as
                              Director expires in 2002.

Michael J. Zak .............. Director of the Corporation since December 1994.
                              Mr. Zak, age 46, has been employed by Charles
                              River Ventures of Waltham, Massachusetts since
                              1991 and has been a general partner of Charles
                              River Partnership VII and its related entities
                              since 1993. From 1986 through 1991, he was a
                              founder and corporate officer of Concord
                              Communications, Inc., a developer of network
                              management software. He is a director of four
                              private companies. Mr. Zak has a B.S. degree in
                              engineering from Cornell University and an M.B.A.
                              from Harvard Business School. Mr. Zak serves on
                              the Human Resources and Corporate Governance
                              Committees of the Board of Directors. Mr. Zak's
                              term as Director expires in 2002.


                                       3
<PAGE>

                     Board and Board Committee Information

Board Committees

      The current committees of the Board of Directors each consist entirely of
non-employee directors. The Corporation's Audit Committee makes recommendations
concerning the engagement of independent public accountants, reviews the plans
and results of the audit engagement with the independent public accountants,
reviews the independence of the independent public accountants, considers the
range of audit and non-audit fees and reviews the adequacy of the Corporation's
internal accounting controls. Professor Bradley and Messrs. Zak and Dillon are
the members of the Audit Committee. The Corporation's Human Resources Committee
determines compensation for the Corporation's executive officers and administers
the Corporation's 1999 Non-Officer Stock Option Plan (the "Non-Officer Plan"),
the Amended and Restated 1994 Stock Option Plan (the "1994 Plan"), the Second
Amended and Restated 1994 Stock Option Plan and the 1999 Employee Stock Purchase
Plan. Messrs. Zak, Cash and Oliver were the members of the Human Resources
Committee in 1999. Mr. Bayless was a member of the Human Resources Committee
until his resignation from the Board of Directors in March 1999.

Attendance at Meetings

      During fiscal 1999, the Board of Directors held twelve meetings, the Audit
Committee held four meetings and the Human Resources Committee held eleven
meetings. Each director of the Corporation attended 75% or more of all Board of
Director meetings and 75% or more of all meetings of each committee on which he
served. Mr. Dillon was elected to the Board of Directors in October 1999 and
attended 75% or more of all Board of Director meetings and 75% or more of all
meetings of each committee on which he served during his term.

Directors' Fees

      Members of the Board of Directors receive $2,500 for participation in each
regular meeting of the full Board of Directors and $1,250 for each committee
meeting. The Corporation also reimburses each member of the Board of Directors
for out-of-pocket expenses incurred in connection with attendance at meetings.
Under the Corporation's 1996 Outside Directors Stock Option Plan (the "Directors
Plan"), non-employee Directors are eligible to receive stock options in
consideration for their services. The Directors Plan provides that each
non-employee Director will receive an option grant for 30,000 shares of Common
Stock upon joining the Board of Directors and an annual option grant for 10,000
shares of Common Stock thereafter. The exercise price of options granted under
the Directors Plan will be equal in all cases to the fair market value of the
Common Stock on the date of grant. Initial grants under the Directors Plan vest
over a period of three years and annual grants vest in full on the first
anniversary of the date of grant. Options generally must be exercised within ten
years.

      At the annual meeting held on March 10, 1999, each of Professor Bradley
and Messrs. Cash, Oliver and Zak, the non-employee Directors who were re-elected
to the Board of Directors at that annual meeting, received the annual option
grant under the Directors Plan for 10,000 shares of Common Stock, with an
exercise price of $25.063 per share. Mr. Dillon received an initial option grant
for 30,000 shares of Common Stock on October 20, 1999 when he was first
appointed to the Board of Directors, with an exercise price of $29.813 per
share. Mr. Taylor received an initial option grant for 30,000 shares of Common
Stock on January 5, 2000 when he was first appointed to the Board of Directors,
with an exercise price of $49.75 per share. Professor Bradley received an option
grant for 30,000 shares of Common Stock effective November 12, 1998 under the
1994 Plan, with an exercise price of $17.375 per share.


                                       4
<PAGE>

                      Beneficial Ownership of Common Stock

      The following table sets forth certain information as of December 31, 1999
(unless otherwise specified) with respect to the beneficial ownership of the
Corporation's Common Stock by each person who is known to the Corporation to
have beneficial ownership of more than 5% of the outstanding shares of Common
Stock, each director, each Named Executive Officer (as defined below), and all
directors and executive officers as a group.

<TABLE>
<CAPTION>
                                                            Amount and Nature of
Name of Beneficial Owner                                   Beneficial Ownership(1)   Percent of Class
- ----------------------                                     -----------------------   ----------------
<S>                                                               <C>                      <C>
Patrick H. Nettles, Ph.D. (2)(3)                                   3,653,261               2.61%
Gary B. Smith (2)                                                     13,188                 *
Joseph R. Chinnici(2)                                                233,727                 *
Steve W. Chaddick(2)                                                 668,438                 *
Mark Cummings(2)                                                     172,688                 *
Harvey B. Cash(2)(4)                                               2,887,469               2.08%
Billy B. Oliver(2)                                                    61,625                 *
Michael J. Zak(2)(5)                                                 517,375                 *
Stephen P.  Bradley, Ph.D.(2)                                         10,000                 *
John R.  Dillon(2)                                                       100                 *
Gerald H. Taylor(2)                                                        0                 *
All officers and directors as a group (18 persons)(2)(6)          10,474,675               7.42%
</TABLE>

- ----------
* Represents less than 1%.

(1)   The persons named in this table have sole voting and investment power with
      respect to all shares of Common Stock shown as beneficially owned by them,
      subject to community property laws where applicable and except as
      indicated in the other footnotes to this table. Beneficial ownership is
      determined in accordance with the rules of the United States Securities
      and Exchange Commission ("SEC"). In computing the number of shares
      beneficially owned by a person and the percentage ownership of that
      person, shares of Common Stock subject to options or warrants held by that
      person that are currently exercisable or exercisable within 60 days after
      December 31, 1999 are deemed outstanding. Such shares, however, are not
      deemed outstanding for the purpose of computing the percentage ownership
      of any other person.

(2)   Includes shares issuable upon exercise of stock options granted under the
      1994 Plan or the Directors Plan. Options granted under the 1994 Plan that
      are reflected in the beneficial ownership table are generally exercisable
      immediately but may be subject to a right of repurchase based on a
      scheduled vesting period. Generally, shares underlying options vest over
      four years and options must be exercised within ten years. Initial grants
      of options under the Directors Plan vest over a period of three years,
      annual grants vest in full on the first anniversary date of the grant and
      options must be exercised within ten years of the date of grant.

(3)   Does not include 175,000 shares held by the Patrick H. and Marion S.
      Nettles Charitable Trust and 175,000 shares held by The Patrick and Selma
      Nettles Charitable Remainder Unitary Trust FBO Caltech. Dr. Nettles
      disclaims beneficial ownership of the shares held by each of these trusts.

(4)   Includes 2,632,434 shares of Common Stock owned by InterWest Partners VI,
      L.P., which Mr. Cash may be deemed to beneficially own by virtue of his
      status as a Managing Director of InterWest Management Partners VI, LLC,
      which is the general partner of InterWest Partners VI, L.P., and 82,535
      shares owned by InterWest Investors VI, L.P., which Mr. Cash may be deemed
      to beneficially own by virtue of his status as a Managing Director of
      InterWest Management Partners VI, LLC, which is the general partner of
      InterWest Investors VI, L.P. Mr. Cash disclaims beneficial ownership of
      the shares held by such entities except to the extent of his proportionate
      partnership interest therein. Mr. Cash has direct ownership of 172,500
      shares of Common Stock, including 72,500 shares owned by the Harvey B.
      Cash self-directed IRA.

(5)   Includes 275,075 shares of Common Stock owned by Charles River Partnership
      VIII, which Mr. Zak may be deemed to beneficially own by virtue of his
      status as a general partner of Charles River Partnership VIII, 5,068
      shares of Common Stock owned by Charles River VIII-A LLC, which Mr. Zak
      may be deemed to beneficially own by virtue of his status as an officer of
      the manager of Charles River VII-A LLC, and 13,214 shares of


                                       5
<PAGE>

      Common Stock owned by the Zak Family Limited Partnership, which Mr. Zak
      may be deemed to beneficially own by virtue of his status as a limited
      partner of the Zak Family Partnership. Mr. Zak disclaims beneficial
      ownership of the shares held by such entities except to the extent of his
      proportionate partnership interest therein. Mr. Zak has direct ownership
      of 219,018 shares of Common Stock.

(6)   Includes 208,451 shares that are subject to repurchase by the Corporation
      based upon a scheduled vesting period, and 71,999 shares held in escrow on
      behalf of executive officers who joined the Corporation in connection with
      its acquisition of Lightera Networks, Inc. in March 1999 and its
      acquisition of Omnia Communications, Inc. in July 1999. Includes 181,329
      shares held by the Champa Irrevocable Trust, as to which Michael Champa
      disclaims beneficial ownership.

                                  Compensation

Summary Compensation Table

      The following table sets forth the annual and long-term compensation for
services in all capacities to the Corporation for the fiscal years ended October
31, 1999, 1998 and 1997 of the Chief Executive Officer and the Named Executive
Officers:

<TABLE>
<CAPTION>
                                                                             Long-Term
                                               Annual Compensation          Compensation
                                          -----------------------------     ------------
                                                                             Securities
                                                                             Underlying      All Other
                                          Year      Salary       Bonus        Options     Compensation(1)
                                          ----      ------       -----        -------     --------------
<S>                                       <C>      <C>         <C>            <C>            <C>
Patrick H. Nettles, Ph.D ................ 1999     $348,077    $362,500       100,000        $2,740
President and Chief Executive Officer     1998     $300,000    $150,000             0         5,480
                                          1997     $253,365    $168,750             0         5,480

Gary B. Smith ........................... 1999     $277,404    $215,625       197,500        $  199
Senior Vice President and                 1998     $160,000    $ 90,000        50,000           199
Chief Operating Officer                   1997     $      0    $      0             0             0

Mark Cummings ........................... 1999     $229,808    $115,625        40,000        $  184
Senior Vice President, Operations         1998     $225,000    $ 56,250             0           184
                                          1997     $159,519    $ 67,500             0           184

Steve W. Chaddick ....................... 1999     $229,808    $115,625       105,000        $  348
President, Core Switching Division        1998     $225,000    $ 56,250             0           348
                                          1997     $160,385    $ 67,500             0           348

Joseph R. Chinnici ...................... 1999     $229,808    $115,625        55,000        $  170
Senior Vice President, Finance and        1998     $225,000    $ 56,250             0           170
Chief Financial Officer                   1997     $159,519    $ 67,500             0           170
</TABLE>

(1)   The Corporation's life insurance plan provides each employee with life
      insurance coverage equal to two times the employee's annual salary and
      bonus, up to a maximum of $500,000. These amounts represent life insurance
      premiums paid by the Corporation on behalf of the Chief Executive Officer
      and the Named Executive Officers in order to provide additional coverage
      equal to the difference between $500,000 and twice the individual's annual
      salary and bonus.


                                       6
<PAGE>

Option Grants in Last Fiscal Year

      The following table provides the specified information concerning options
granted to the Named Executive Officers for the fiscal year ended October 31,
1999:

<TABLE>
<CAPTION>
                               Number of    Percent of
                              Securities   Total Options                                   Potential Realizable Value at
                              Underlying    Granted to      Exercise or                        Assumed Annual Rates of
                                Options    Employees In     Base Price                      Stock Price Appreciation for
                              Granted(1)    Fiscal 1999   (Per Share)(2)  Expiration Date           Option Term (3)
                              ----------   -------------  --------------  ---------------  -----------------------------
                                                                                                  5%          10%
                                                                                                -----        -----
<S>                             <C>            <C>            <C>             <C>            <C>          <C>
Patrick H. Nettles, Ph.D ....   100,000        1.54%          $ 29.81         10/20/09       $1,874,924   $4,751,424
Gary B. Smith ...............    57,500        0.88%          $ 17.38         11/12/08       $  628,305   $1,592,248
                                100,000        1.54%          $ 32.25         08/23/09       $2,028,185   $5,139,819
                                 40,000        0.61%          $ 29.81         10/20/09       $  749,969   $1,900,570
Mark Cummings ...............    15,000        0.23%          $ 17.38         11/12/08       $  163,906   $  415,369
                                 25,000        0.38%          $ 29.81         10/20/09       $  468,731   $1,187,856
Steve W. Chaddick ...........    15,000        0.23%          $ 17.38         11/12/08       $  163,906   $  415,369
                                 50,000        0.77%          $ 32.25         08/23/09       $1,014,093   $2,569,910
                                 40,000        0.61%          $ 29.81         10/20/09       $  749,969   $1,900,570
Joseph R. Chinnici ..........    15,000        0.23%          $ 17.38         11/12/08       $  163,906   $  415,369
                                 40,000        0.61%          $ 29.81         10/20/09       $  749,969   $1,900,570
</TABLE>

(1)   Options vest and become exercisable 25% on the last day of the month in
      which the first anniversary of the grant occurs and 2.084% per month
      thereafter. As of October 31, 1999, none of these options were vested. As
      of November 30, 1999, the first anniversary of the options granted on
      November 8, 1998 to Messrs. Smith, Cummings, Chaddick occurred, 14,375,
      3,750, 3,750 and 3,750, respectively, of those options became vested.

(2)   Options were granted having exercise prices at fair market value on the
      date of grant.

(3)   The dollar amounts set forth under these columns are the result of
      calculations of assumed annual rates of stock price appreciation of 5% and
      10% from the date of grant to the date of expiration of such options.
      These assumptions are not intended to forecast future appreciation of the
      Corporation's stock price. The Corporation's stock price may increase or
      decrease in value over the time period set forth above.

Aggregated Option Exercises in Last Fiscal Year and Fiscal Year-End Option
Values

      The following table provides the specified information concerning
unexercised options held as of October 31, 1999 by the Named Executive Officers:

<TABLE>
<CAPTION>
                                Shares                     Number of Securities Underlying    Value of Unexercised in-the-
                              Acquired on                       Unexercised Options at              Money Options at
                               Exercise    Value Realized        October 31, 1999(1)               October 31, 1999(2)
                              -----------  --------------  -------------------------------    ----------------------------
                                                           Exercisable       Unexercisable    Exercisable    Unexercisable
                                                           -----------       -------------    -----------    -------------
<S>                              <C>         <C>             <C>                <C>           <C>             <C>
Patrick H. Nettles, Ph.D ....         0      $        0      875,000            100,000       $28,227,500     $  474,700
Gary B. Smith ...............         0      $        0       20,834            226,666       $   462,202     $2,056,065
Mark Cummings ...............    13,000      $  335,624      175,000             40,000       $ 5,817,000     $  376,450
Steve W. Chaddick ...........    60,000      $1,997,318      536,250            105,000       $17,807,338     $  563,155
Joseph R. Chinnici ..........         0      $        0      245,250             55,000       $ 8,304,635     $  447,655
</TABLE>

(1)   All options granted prior to Fiscal 1998 are exercisable at the date of
      grant, but shares purchased upon exercise of options are subject to
      repurchase by the Corporation based upon a scheduled vesting period. Of
      the shares underlying options, 729,167, 20,834, 133,334, 340,939 and
      187,855 of the shares underlying options held by Dr. Nettles and Messrs.
      Smith, Cummings, Chaddick, and Chinnici, respectively, are vested.

(2)   Calculated on the basis of the fair market value of the underlying common
      stock as of October 31, 1999 of $34.56 per share, less the aggregate
      exercise price. The value of vested in-the-money options held by Dr.
      Nettles and Messrs. Smith, Cummings, Chaddick, and Chinnici is
      $23,522,927, $462,202, $4,432,022, $11,506,605, and $6,453,072,
      respectively.


                                       7
<PAGE>

Employment Agreements and Change-in-Control Arrangements

      In April 1994, the Corporation entered into an employment agreement with
Dr. Nettles. The employment agreement specifies that Dr. Nettles is an employee
at will. In the event that he is terminated for cause, as defined in the
employment agreement, he will receive a severance payment equal to his monthly
base salary until the earlier of the expiration of six months or the
commencement of employment with a person or entity other than the Corporation.

      In November 1998, the Corporation entered into transfer of
control/severance agreements with Dr. Nettles, and Messrs. Smith, Cummings,
Chaddick and Chinnici. The initial term of each of these agreements is three
years. The agreements provide for the payment of up to one year of salary and
bonus continuation in the event that the Named Executive Officer's employment is
terminated without cause or for "good reason," as defined in the agreements,
within one year following a change-in-control of the Corporation.

      In August 1999, the Corporation entered into an employment agreement with
Mr. Smith. The employment agreement provides for payment of an incentive bonus
of $3,000,000 to Mr. Smith upon the earlier of: (i) his termination without
cause or for "good reason," as defined in the agreement, following a transfer of
control, or (ii) on August 18, 2002. In the event that Mr. Smith elects to
terminate his employment for "good reason" as defined in the agreement, or he is
terminated for any reason other than for cause, he will receive a pro-rata
portion of the incentive bonus.

Human Resources Committee Report on Executive Compensation

      The Human Resources Committee of the Board of Directors (the "Committee")
in fiscal 1999 consisted of Messrs. Zak, Cash and Oliver, none of whom are
employees or officers of the Corporation. Mr. Bayless was a member of the
Committee until his resignation from the Board of Directors in March 1999. Mr.
Cash was elected to the Committee in September of 1999. The Committee advises
and assists management in developing the Corporation's compensation and
personnel policies, and provides Board oversight of their implementation. The
Committee endeavors to meet no less than four times per year to review issues
associated with compensation, human resources policies, personnel recruitment
and retention and to consider, amend, or approve quarterly objectives for the
Corporation, including for management, as recommended by the Corporation's Chief
Executive Officer.

      The Committee has adopted a performance-based compensation policy that
considers both the long and short term. These two components are linked in a way
intended to focus management on increasing the strength of the business and its
ability to serve important customers with leading, high-value products, while
building the organization in a deliberate, thoughtful way. The Committee
believes that this policy will increase stockholder value over the long term. On
at least an annual basis, the Committee approves the Corporation's compensation
package for executive officers, which includes a combination of annual base
salary and benefits, performance-based quarterly bonuses, and long-term
compensation consisting of stock options. Annual base salaries are established
following an assessment by the Committee of market survey data for comparable
positions in comparable companies compiled by an independent compensation
consultant. The Committee's goal is to set the Corporation's compensation for
various positions at levels that are generally favorable to the averages
indicated by the market survey data. The Committee typically targets the
fiftieth percentile for compensation, taking into account regional and national
data, together with the skills and performance of the individual and the needs
of the Corporation. Quarterly bonus payments to members of management are
awarded following assessment by the Committee of performance compared to
corporate objectives.

      Annual base salaries for members of management, including Patrick H.
Nettles, the President and Chief Executive Officer of the Corporation, were most
recently reassessed and reset for fiscal 1999 in


                                       8
<PAGE>

accordance with the foregoing policy in August 1999 as a result of the
Corporation's acquisitions of Lightera Networks and Omnia Communications. The
Committee also determined that the Corporation's quarterly corporate objectives
were met or otherwise satisfied during each of the four fiscal quarters of the
fiscal year ending October 31, 1999, and bonuses were paid accordingly at the
conclusion of each quarter during fiscal 1999. Management participates, along
with all other employees, in the Corporation's annual grant of stock options to
employees who have worked for the Corporation for at least one year. In
addition, consistent with the Corporation's policy, members of management who
were promoted during fiscal 1999 received an additional grant of stock options.
The annual grant of stock options was first implemented in November 1998.

      With respect to the compensation of Dr. Nettles for the overall fiscal
year ended October 31, 1999, the Committee recognized his unique role and
responsibility as President and Chief Executive Officer of the Corporation, but
otherwise considered no factors or criteria different from those applied to
members of management generally.

      For fiscal 2000, if the Committee determines that the corporate objectives
have been met or otherwise satisfied in each of the four fiscal quarters, the
bonus payments, which are paid quarterly on an equal pro rata basis, will equal
35%, 50%, 75% or 100% of base salary, with the exact percentage based on the
particular officer's title and responsibilities, as viewed by the Committee.
Only the Chief Executive Officer is eligible for a bonus of up to 100% of base
salary in fiscal 2000.

      Under Section 162(m) of the Internal Revenue Code of 1986, as amended (the
"Code"), and applicable Treasury regulations, no tax deduction is allowed for
annual compensation in excess of $1 million paid to any of the five most highly
compensated executive officers. "Performance-based" compensation that has been
approved by stockholders, however, is excluded from the $1 million limit if,
among other requirements, the compensation is payable only upon attainment of
pre-established objective performance goals and the board committee that
establishes such goals consists only of "outside directors" as defined for
purposes of Section 162(m). The Board of Directors has approved the adoption of
the CIENA Corporation Third Amended and Restated 1994 Stock Option Plan (the
"Third Amended and Restated Plan"), which is structured to qualify as
"performance-based," and is submitting that plan for shareholder approval at
this Annual Meeting. In addition, all of the members of the Human Resources
Committee qualify as "outside directors." Accordingly, assuming shareholder
approval of the Third Amended and Restated Plan, compensation paid to the
Corporation's five most highly compensated executive officers under that plan
should be deductible under Section 162(m). The Human Resources Committee thus
intends to structure performance-based compensation, including stock option
grants and annual bonuses, to executive officers who may be subject to Section
162(m) in a manner that satisfies the requirements of Section 162(m) so long as
doing so is compatible with its determinations as to the most appropriate
methods and approaches for the design and delivery of compensation to executive
officers of CIENA.

      Submitted by the members of the Human Resources Committee:

                                 Michael J. Zak
                                 Harvey B. Cash
                                 Billy B. Oliver

           Compensation Committee Interlocks and Insider Participation

      The Human Resources Committee of the Board of Directors, which serves the
traditional functions of a compensation committee, consists of Michael J. Zak,
Harvey B. Cash and Billy B. Oliver. None of Messrs. Zak, Cash and Oliver was at
any time during the fiscal year ended October 31, 1999, or at any other time, an
officer or employee of the Corporation. No member of the Human Resources
Committee


                                       9
<PAGE>

of the Corporation serves as a member of the board of directors or compensation
committee of any entity that has one or more executive officers serving as a
member of the Corporation's Board of Directors or Human Resources Committee.

      On March 31, 1999, the Corporation acquired Lightera Networks, Inc. for
approximately 20.6 million shares of CIENA Common Stock. Mr. Cash is a general
partner of InterWest Partners, which is an affiliate of InterWest VI, L.P. and
InterWest Investors VI, L.P. Together, these two InterWest entities owned
193,416 shares of Lightera common stock, 2,632,584 shares of Lightera Series A
preferred stock and 476,190 shares of Series B preferred stock. In the merger,
these partnerships received an aggregate of 2,714,968 shares of CIENA Common
Stock.

      On July 1, 1999, the Corporation acquired Omnia Communications, Inc. for
approximately 16 million shares of CIENA Common Stock. Mr. Zak is a general
partner of the general partner of Charles River Partnership VIII, a Limited
Partnership and Charles River VIII-A LLC, which together owned 2,228,000 shares
of Omnia common stock, 2,228,000 shares of Omnia Series A preferred stock and
698,370 shares of Omnia Series B preferred stock. In the merger, these
partnerships received an aggregate of approximately 2.5 million shares of CIENA
Common Stock.

                   Shareholder Return Performance Presentation

      The following graph shows a comparison of cumulative total returns for an
investment in the Common Stock of the Corporation, the NASDAQ Telecommunications
Index and the S&P 500 Index. Although the SEC requires the Corporation to
present such a graph for a five-year period, the Common Stock has been publicly
traded only since February 7, 1997 and, as a result, the following graph
commences as of such date. This graph is not deemed to be "soliciting material"
or to be "filed" with the SEC or subject to the SEC's proxy rules or to the
liabilities of Section 18 of the Exchange Act of 1934, and the graph shall not
be deemed to be incorporated by reference into any prior or subsequent filing by
the Corporation under the Securities Act of 1933 or the 1934 Act.

  [The following table was depicted as a line graph in the printed material.]

                 NASDAQ Telecom Index      S&P 500      CIENA Common Stock
                 --------------------      -------      ------------------

      02/07/97           100.00             100.00            $100.00
      04/30/97            93.69             101.95            $ 84.46
      07/31/97           120.28             122.01            $151.69
      10/31/97           134.99             117.52            $148.65
      01/30/98           151.85             126.51            $148.82
      04/30/98           178.66             144.18            $150.68
      07/31/98           199.31             145.93            $200.17
      10/30/98           185.23             143.48            $ 46.45
      01/29/99           270.70             168.24            $ 54.56
      04/30/99           307.24             175.57            $ 63.51
      07/30/99           302.07             175.41            $ 91.22
      10/29/99           339.97             180.98            $ 95.27

      Assumes $100 invested in CIENA Corporation, NASDAQ Telecom Index and S&P
500 on February 7, 1997, with all dividends reinvested at month-end.


                                       10
<PAGE>

                                   PROPOSAL 2

Adoption of CIENA Corporation Third Amended and Restated 1994 Stock Option Plan

General

      The Corporation has had a stock option plan, the CIENA Corporation Amended
and Restated 1994 Stock Option Plan (the "1994 Plan"), which was initially
adopted in 1994 and is designed to attract, retain and reward persons providing
services to CIENA, and to motivate these persons to contribute to the growth and
profits of CIENA in the future. In 1998, the Board of Directors approved
amending and restating the 1994 Plan, resulting in the CIENA Corporation Second
Amended and Restated 1994 Stock Option Plan (the "Second Amended and Restated
Plan"). The Board of Directors has considered and approved certain amendments to
the Second Amended and Restated Plan, resulting in the CIENA Corporation Third
Amended and Restated 1994 Stock Option Plan (the "Third Amended and Restated
Plan"), and is proposing the Third Amended and Restated Plan, as it amends the
Second Amended and Restated Plan, for stockholder approval.

      The Third Amended and Restated Plan amends the Second Amended and Restated
Plan by, among other matters, making the following changes:

            o     Retaining the authorized shares reserved for issuance pursuant
                  to stock options at twenty million fifty thousand (20,050,000)
                  shares and adding an additional four percent (4%) of the
                  number of issued and outstanding shares of stock of CIENA (but
                  not including increases resulting from the issuance of shares
                  under the Third Amended and Restated Plan) on each of the
                  first five annual anniversaries of the Third Amended and
                  Restated Plan's effective date;

            o     Limiting to twenty million fifty thousand (20,050,000) the
                  number of shares that may be issued under the Third Amended
                  and Restated Plan pursuant to incentive stock options;

            o     Limiting to one million (1,000,000) the number of shares that
                  may be issued under the Third Amended and Restated Plan to any
                  single individual in a calendar year;

            o     Clarifying that, in addition to the standard credit of twelve
                  (12) full months of accelerated vesting upon a Transfer of
                  Control currently provided for in the Second Amended and
                  Restated Plan, the Board has the authority to grant at the
                  time an option grant is made an additional credit of
                  accelerated vesting of the shares subject to the options upon
                  a Transfer of Control;

            o     Designating that the committee administering the Third Amended
                  and Restated Plan shall consist of at least two outside
                  directors; and

            o     Extending the date by which incentive stock options granted
                  under the Third Amended and Restated Plan must be granted from
                  within ten (10) years of April 4, 1997 to within ten (10)
                  years of January 13, 2000.

The Human Resources Committee of the Board of Directors (the "Committee") has
administered the Second Amended and Restated Plan. If the stockholders approve
it, the Committee will also administer the Third Amended and Restated Plan.

      The Board of Directors has directed that the Third Amended and Restated
Plan be submitted to the stockholders in its entirety for approval. If the
stockholders do not approve the Third Amended and Restated Plan, the Second
Amended and Restated Plan will remain in effect.


                                       11
<PAGE>

Summary of the Third Amended and Restated 1994 Stock Option Plan

      The following summary of the Third Amended and Restated Plan does not
purport to be complete, and is subject to and qualified in its entirety by
reference to the complete text of the Third Amended and Restated Plan, which is
attached hereto as Appendix 1 and is incorporated herein by reference.

      Eligibility

      Options may be granted only to employees (including officers) and
directors of CIENA or any parent or subsidiary of CIENA or to individuals who
are rendering services as consultants, advisors, or other independent
contractors to CIENA or any parent or subsidiary of CIENA.

      Stock Subject to the Third Amended and Restated Plan

      As originally adopted by the Board and approved by the shareholders, the
1994 Plan provides that grants may be made with respect to no more than twenty
million fifty thousand (20,050,000) shares of Common Stock in the aggregate. The
aggregate grants made since the 1994 Plan was originally adopted have used up
most of the shares initially authorized for grants under the 1994 Plan.

      The Third Amended and Restated Plan sets the number of shares of Common
Stock available for grants under the Third Amended and Restated Plan to the sum
of twenty million fifty thousand (20,050,000), plus an additional four percent
(4%) of the number of issued and outstanding shares of Common Stock (but not
including increases resulting from the issuance of shares under the Third
Amended and Restated Plan) on each of the first five annual anniversaries of the
effective date of the Third Amended and Restated Plan. The Third Amended and
Restated Plan also provides that no more than twenty million fifty thousand
(20,050,000) shares of Common Stock may be issued under the Third Amended and
Restated Plan as incentive stock options. The provision providing for an
additional 4% of the number of issued and outstanding shares of Common Stock on
each of the first five anniversary dates is necessary to provide for future
grants of options under the Third Amended and Restated Plan. This change is
intended to further the purpose of the 1994 Plan as approved by the
stockholders. In the judgment of the Board of Directors, these additional
options will be a valuable incentive and will serve to the ultimate benefit of
stockholders by aligning more closely the interests of officers, other key
employees and other individuals with those of the stockholders.

      Under Section 162(m) of the Code, if the optionee is one of certain
specified executive officers, then, unless certain exceptions apply, the
employer is not entitled to deduct compensation with respect to the optionee,
including compensation related to the exercise of stock options, to the extent
such compensation in the aggregate exceeds $1,000,000 for the taxable year. To
be eligible for an exception, Section 162(m) requires that option plans such as
the Third Amended and Restated Plan must provide the maximum number of options
that can be granted to the specified executive officers subject to stockholder
approval. The Third Amended and Restated Plan provides that options covering up
to one million shares (1,000,000) shares may be granted to any Plan participant
during a calendar year. The options are intended to comply with the exception to
Section 162(m) for "performance-based" compensation.

      Each of the limits described above relating to the number of shares of
Common Stock available for issuance under the Third Amended and Restated Plan is
subject to adjustment for stock dividends, splits and other similar events. In
addition, if any shares of Common Stock covered by an option are not purchased
or are forfeited, or if the option otherwise terminates without delivery of any
shares of Common Stock subject thereto, then the number of shares of Common
Stock counted against the aggregate number of shares available under the Third
Amended and Restated Plan with respect to such option will, to the extent of any
such forfeiture or termination, again be available for making awards under the
Third Amended and Restated Plan.


                                       12
<PAGE>

      Stock Options

      The Third Amended and Restated Plan permits the granting of options to
purchase shares of Common Stock intended to qualify as incentive stock options
under the Code and options that do not qualify as incentive stock options. The
exercise price of each option will be determined by the Committee but may not be
less than 100% of the fair market value of CIENA's Common Stock on the date of
grant in the case of incentive stock options and 85% of the fair market value of
CIENA's Common Stock on the date of grant in the case of non-qualified stock
options. To qualify as incentive stock options, options must meet certain
federal tax requirements, including limits on the value of shares subject to
incentive stock options which first become exercisable in any one calendar year,
and a shorter term and higher minimum exercise price in the case of certain
large stockholders.

      The term of each option will be fixed by the Committee and may not exceed
10 years from the date of grant. The options granted under the Third Amended and
Restated Plan will vest in the amount of 25% of the covered shares on the last
day of the month in which the first anniversary of the date of grant occurs and
a rate of 2.084% of the covered shares per month thereafter. In general, vested
options are exercisable for thirty days following termination of the optionee's
employment for a reason other than death or disability. Vested options are
exercisable for a period of twelve months following a termination for death or
disability. Options may be made exercisable in installments. The exercisability
of options may be accelerated by the Committee.

      Upon exercise of options, the option exercise price must be paid in full
either in cash or cash equivalents or by delivery of Common Stock already owned
and held by the optionee for at least six months. If the Committee so permits,
the exercise price may also be delivered to CIENA by a broker pursuant to
irrevocable instructions to the broker from the optionee.

      General Provisions

      Transfer of Control. Each option granted under the Third Amended and
Restated Plan will be credited, as of the proposed effective date of a Transfer
of Control, and if the optionee is still employed by CIENA on the date such
Transfer of Control is consummated, with the longer of (a) twelve (12) full
months of additional vesting of the shares subject to the option or (b) the
number of months of additional vesting of the shares subject to the option as
may be designated by the Board and set forth in the Notice of Grant on the date
that the option was granted. If the successor entity does not assume the
outstanding options or arrange for the substitution for outstanding options of
new options covering the stock of the successor entity, all outstanding options
will be fully exercisable thirty (30) days before the Transfer of Control and
shall terminate immediately after the Transfer of Control.

      Amendments and Termination. The Board of Directors may at any time amend
or discontinue the Third Amended and Restated Plan and the Committee may at any
time amend or cancel outstanding awards for the purpose of satisfying changes in
law or for any other lawful purpose. However, no such action may be taken which
adversely affects any rights under an outstanding award without the holder's
consent. Further, plan amendments may be subject to approval by CIENA's
stockholders if and to the extent required by the Code to preserve the qualified
status of incentive stock options.

      Adjustments for Stock Dividends and Similar Events. The Committee will
make appropriate adjustments in outstanding awards to reflect Common Stock
dividends, splits and similar events.

      Federal Income Tax Consequences

      Incentive stock options. The grant of an incentive stock option will not
be a taxable event for the optionee or CIENA. An optionee will not recognize
taxable income upon exercise of an incentive stock option (except that the
alternative minimum tax may apply), and any gain realized upon a disposition of
Common Stock received pursuant to the exercise of an incentive stock option will
be taxed as long-term


                                       13
<PAGE>

capital gain if the optionee holds the shares for at least two years after the
date of grant and for one year after the date of exercise (the "holding period
requirement"). CIENA will not be entitled to any business expense deduction with
respect to the exercise of an incentive stock option, except as discussed below.

      For the exercise of an option to qualify for the foregoing tax treatment,
the optionee generally must be an employee of CIENA or a subsidiary from the
date the option is granted through a date within three months before the date of
exercise of the option. In the case of an optionee who is disabled, the
three-month period for exercise following termination of employment is extended
to one year. In the case of an employee who dies, both the time for exercising
incentive stock options after termination of employment and the holding period
for Common Stock received pursuant to the exercise of the option are waived.

      If all of the foregoing requirements are met except the holding period
requirement mentioned above, the optionee will recognize ordinary income upon
the disposition of the Common Stock in an amount generally equal to the excess
of the fair market value of the Common Stock at the time the option was
exercised over the option exercise price (but not in excess of the gain realized
on the sale). The balance of the realized gain, if any, will be capital gain.
The employer corporation will be allowed a business expense deduction to the
extent the optionee recognizes ordinary income subject to Section 162(m) of the
Code summarized below.

      If an optionee exercises an incentive stock option by tendering Common
Stock with a fair market value equal to part or all of the option exercise
price, the exchange of shares will be treated as a nontaxable exchange (except
that this treatment would not apply if the optionee had acquired the shares
being transferred pursuant to the exercise of an incentive stock option and had
not satisfied the holding period requirement summarized above). If the exercise
is treated as a tax free exchange, the optionee would have no taxable income
from the exchange and exercise (other than minimum taxable income as discussed
above) and the tax basis of the shares exchanged would be treated as the
substituted basis for the shares received. If the optionee used shares received
pursuant to the exercise of an incentive stock option (or another statutory
option) as to which the optionee had not satisfied the applicable holding period
requirement, the exchange would be treated as a taxable disqualifying
disposition of the exchanged shares.

      If, pursuant to an option agreement, CIENA withholds shares in payment of
the option price for incentive stock options, the transaction should generally
be treated as if the withheld shares had been sold in a disqualifying
disposition after exercise of the option, so that the optionee will realize
ordinary income with respect to such shares. The shares paid for by the withheld
shares should be treated as having been received upon exercise of an incentive
stock option, with the tax consequences described above. However, the Internal
Revenue Service has not ruled on the tax treatment of shares received on
exercise of an incentive stock option where the option exercise price is paid
with withheld shares.

      Non-Qualified Stock Options. The grant of a non-qualified stock option
will not be a taxable event for the optionee or CIENA. Upon exercising a
non-qualified stock option, an optionee will recognize ordinary income in an
amount equal to the difference between the exercise price and the fair market
value of the Common Stock on the date of exercise (except that, if the optionee
is subject to certain restrictions imposed by the securities laws, the
measurement date will be deferred, unless the optionee makes a special tax
election within 30 days after exercise). Upon a subsequent sale or exchange of
shares acquired pursuant to the exercise of a non-qualified stock option, the
optionee will have taxable gain or loss, measured by the difference between the
amount realized on the disposition and the tax basis of the shares (generally,
the amount paid for the shares plus the amount treated as ordinary income at the
time the option was exercised).

      If the employer corporation complies with applicable reporting
requirements and with the restrictions of Section 162(m) of the Code, it will be
entitled to a business expense deduction in the same amount and generally at the
same time as the optionee recognizes ordinary income. Under


                                       14
<PAGE>

Section 162(m) of the Code, if the optionee is one of certain specified
executive officers, then, unless certain exceptions apply, the employer is not
entitled to deduct compensation with respect to the optionee, including
compensation related to the exercise of shares options, to the extent such
compensation in the aggregate exceeds $1.0 million for the taxable year. The
options are intended to comply with the exception to Section 162(m) for
"performance-based" compensation.

      If the optionee surrenders Common Stock in payment of part or all of the
exercise price for non-qualified stock options, no gain or loss will be
recognized with respect to the shares surrendered (regardless of whether the
shares were acquired pursuant to the exercise of an incentive stock option) and
the optionee will be treated as receiving an equivalent number of shares
pursuant to the exercise of the option in a nontaxable exchange. The basis of
the shares surrendered will be treated as the substituted tax basis for an
equivalent number of option shares received and the new shares will be treated
as having been held for the same holding period as had expired with respect to
the transferred shares. The difference between the aggregate option exercise
price and the aggregate fair market value of the shares received pursuant to the
exercise of the option will be taxed as ordinary income. The optionee's basis in
the additional shares will be equal to the amount included in the optionee's
income.

      If, pursuant to an option agreement, CIENA withholds shares in payment of
the option price for non-qualified stock options or in payment of tax
withholding, the transaction should generally be treated as if the withheld
shares had been sold for an amount equal to the exercise price after exercise of
the option.

      The Board of Directors believes that approval of the CIENA Corporation
Third Amended and Restated 1994 Stock Option Plan is in the best interests of
all stockholders and, accordingly, recommends a vote FOR Proposal 2. Your proxy
will be so voted unless you specify otherwise.

                                   PROPOSAL 3

       Proposal to Amend the Corporation's Third Restated Certification of
                                  Incorporation

      The Board of Directors of the Corporation has approved, declares it
advisable and in the best interests of the Corporation and its stockholders, and
recommends that Article FOURTH of the Corporation's Third Restated Certificate
of Incorporation, as amended (the "Charter"), be amended to increase the
authorized shares of Common Stock from 360,000,000 to 460,000,000. The text of
the Amendment is as follows:

            FOURTH: The Corporation shall have the authority to issue two (2)
            classes of shares to be designated respectively "Preferred Stock"
            and "Common Stock." The total number of shares of stock that the
            Corporation shall have the authority to issue is Four Hundred Eighty
            Million (480,000,000) shares of capital stock, par value $0.01 per
            share. The total number of shares of Preferred Stock that the
            Corporation shall have authority to issue is Twenty Million
            (20,000,000), par value $0.01 per share. The total number of shares
            of Common Stock which the Corporation shall have the authority to
            issue is Four Hundred Sixty Million (460,000,000), par value $0.01
            per share.

      As of December 31, 1999, there were 138,894,581 shares of Common Stock
outstanding. In addition, as of December 31, 1999, options to purchase 8,571,462
shares were outstanding under the 1994 Plan and the Second Amended and Restated
Plan, options to purchase 170,000 shares were outstanding under the Directors
Plan, options to purchase 3,225,725 shares were outstanding under the
Non-Officers Plan and options to purchase an aggregate of 2,635,060 shares were
outstanding under option plans assumed by the Corporation in connection with two
acquisitions. Thus, at December 31, 1999, the Corporation had outstanding or
reserved for issuance 159,573,881 shares of Common Stock.


                                       15
<PAGE>

      The authorization of a total of 460,000,000 shares of Common Stock would
give the Board the express authority, without further action of the
Corporation's stockholders, to issue such shares of Common Stock from time to
time as the Board deems necessary or advisable. The Corporation expends
substantial funds on research and development and other commercialization
activities, including investment in complementary businesses, obtaining the
rights to use complementary technologies, marketing activities and
administrative support of these activities. The Board believes that having the
additional shares authorized and available for issuance will allow the
Corporation to have greater flexibility in considering potential future actions
involving the issuance of stock which may be desirable or necessary to
accommodate the Corporation's business plan, including capital raising
transactions. In addition, the Board believes it is necessary to have the
ability to issue such additional shares for general corporate purposes. Such
general corporate uses of the additional authorized shares of Common Stock may
include acquisition transactions, stock dividends or distributions, and
distributions in connection with future issuances of Preferred Stock of the
Corporation, stock options or warrants. In any case, the additional shares of
Common Stock would be available for issuance by the Board without future action
by the stockholders, unless such action were specifically required by applicable
law or rules of any securities market on which the Corporation's securities may
be traded. The Company has no current plans or proposals to issue any portion of
the additional shares of Common Stock.

      Although the proposed increase in the authorized capital stock of the
Corporation could be construed as having potential anti-takeover effects,
neither the Board nor management of the Corporation views this proposal in that
perspective. Nevertheless, the Corporation could use the additional shares to
frustrate persons seeking to effect a takeover or otherwise gain control of the
Corporation by, for example, privately placing shares to purchasers who might
side with the Board in opposing a hostile takeover bid. The Corporation is not
aware of any such hostile takeover bid at this time. Shares of Common Stock
could also be issued to a holder that would thereafter have sufficient voting
power to assure that any proposal to amend or repeal the Amended and Restated
By-Laws of the Corporation or certain provisions of the Charter would not
receive the requisite vote required. Such uses of the Common Stock could render
more difficult or discourage an attempt to acquire control of the Corporation,
if such transactions were opposed by the Board. Further, an issuance of
additional shares by the Corporation could have the effect on the potential
realizable value of a stockholder's investment in the Corporation. In the
absence of a proportionate increase in the Corporation's earnings and book
value, an increase in the aggregate number of outstanding shares of Common Stock
would dilute the earnings per share and book value per share of all outstanding
shares of the Corporation's Common Stock. The foregoing factors, if reflected in
the price per share of Common Stock, could adversely affect the realizable value
of a stockholder's investment in the Corporation.

      The Board of Directors believes that approval of the proposed amendment to
the Corporation's Charter to increase the number of authorized shares of Common
Stock from 360,000,00 shares to 460,000,000 shares is in the best interests of
all stockholders and, accordingly, recommends a vote FOR Proposal 3. Your proxy
will be so voted unless you specify otherwise.

                                   PROPOSAL 4

                 Ratification of Independent Public Accountants

      The independent public accounting firm of PricewaterhouseCoopers LLP has
acted as the Corporation's independent auditors for the year ended October 31,
1999 and has been selected by the Board of Directors to act as such for the
examination of the Corporation's 2000 financial statements, subject to
ratification by the stockholders. Representatives of PricewaterhouseCoopers LLP
are expected to be present at the stockholders' meeting and will have an
opportunity to make a statement if they desire and to respond to appropriate
questions.


                                       16
<PAGE>

      In the event the appointment of PricewaterhouseCoopers LLP as independent
public auditors for 2000 is not approved by the stockholders, the adverse vote
will be considered as a direction to the Board of Directors to consider the
selection of other auditors for the following year. However, because of the
difficulty in making any substitution of auditors so long after the beginning of
the current year, it is contemplated that the appointment for the year 2000 will
be permitted to stand unless the Board finds other good reason for making a
change.

      The Board of Directors believes that ratification of the selection of
PricewaterhouseCoopers LLP as the corporation's independent public accountants
for the 2000 fiscal year is in the best interests of all stockholders and,
accordingly, recommends a vote FOR Proposal 4. Your proxy will be so voted
unless you specify otherwise.

                                Voting Procedures

      Shares can be voted only if the stockholder is present in person or by
proxy. Whether or not you plan to attend in person, you are encouraged to sign
and return the enclosed proxy card. The representation in person or by proxy of
at least a majority of the outstanding shares entitled to vote is necessary to
provide a quorum at the meeting. Directors are elected by a plurality of the
affirmative votes cast by the stockholders present at the Meeting (in person or
by proxy). Proposals 2, 3 and 4 must be approved by a majority of the shares of
Common Stock voting for or against the Proposals at the Meeting. Unless
otherwise indicated, executed proxies will be voted for Proposals 1 through 4.

      Abstentions and "non-votes" are counted as present in determining whether
the quorum requirement is satisfied. Abstentions and "non-votes" are treated as
votes against proposals presented to stockholders other than elections of
directors. A "non-vote" occurs when a nominee holding shares for a beneficial
owner votes on one proposal, but does not vote on another proposal because the
nominee does not have discretionary voting power and has not received
instructions from the beneficial owner.

                              Stockholder Proposals

      All stockholder proposals intended to be presented at the 2001 Annual
Meeting of the Corporation must be received by the Corporation not later than
October 16, 2000 and must otherwise comply with the rules of the SEC for
inclusion in the Corporation's proxy statement and form of proxy relating to
that meeting.

             Section 16(a) Beneficial Ownership Reporting Compliance

      Michael A. Champa and Charles Chi each filed a late Form 3 reporting their
initial statement of beneficial ownership of the Company's stock. Stephen
Bradley, Michael A. Champa, Steve W. Chaddick, Gary B. Smith and Rebecca E.
Seidman each filed a late Form 4 reporting a single transaction, Charles Chi
filed three late Forms 4 reporting seven transactions, and Harvey Cash filed one
late Form 4 reporting two transactions. Billy Oliver filed four late Forms 4
totaling seven transactions. Clifford Higgerson filed one late Form 5 reporting
two transactions. Steve W. Chaddick filed one late Form 5 reporting one
transaction.

                                  Other Matters

      Management knows of no matters to be presented for action at the meeting
other than those mentioned above. However, if any other matters properly come
before the meeting, it is intended that the persons named in the Corporation's
form of proxy will vote on such other matters in accordance with their judgment
of the best interests of the Corporation.

                                         By Order of the Board of Directors


                                         /s/ Michael O. McCarthy III
                                         Michael O. McCarthy III
                                         Secretary


                                       17
<PAGE>

                                                                      APPENDIX 1

                                CIENA CORPORATION
                           THIRD AMENDED AND RESTATED
                             1994 STOCK OPTION PLAN

      1. Establishment and Purpose.

            (a) Establishment. The CIENA Third Amended and Restated 1994
Employee Stock Option Plan (the "Plan") was adopted effective January 13, 2000
(the "Effective Date").

            (b) Purpose. The purpose of the Plan is to attract, retain and
reward persons providing services to CIENA Corporation, a Delaware corporation,
and any successor corporation thereto (collectively referred to as the
"Company"), and any present or future parent and/or subsidiary corporations of
such corporation (all of which along with the Company being individually
referred to as a "Participating Company" and collectively referred to as the
"Participating Company Group"), and to motivate such persons to contribute to
the growth and profits of the Participating Company Group in the future. For
purposes of the Plan, a parent corporation and a subsidiary corporation shall be
as defined in Sections 424(e) and 424(f) of the Internal Revenue Code of 1986,
as amended (the "Code").

      2. Definitions:

            (a) "Date of Option Grant" shall mean the date set forth on the
Notice of Grant of Stock Options attached hereto as Exhibit A annexed hereto and
made a part hereof.

            (b) "Number of Option Shares" shall mean the number of shares of
common stock of the Company set forth on Notice of Grant of Stock Options as
adjusted from time to time pursuant to paragraph 14 below.

            (c) "Exercise Price" shall mean the price per share set forth on the
Notice of Grant of Stock Option attached hereto as Exhibit A as adjusted from
time to time pursuant to paragraph 14 below.

            (d) "Initial Exercise Date" shall be the Initial Vesting Date.

            (e) "Initial Vesting Date" shall be the last day of the calendar
month in which occurs the date one (1) year after the date set forth on the
Notice of Grant of Stock Options:

            (f) Determination of "Vested Percentage":

                                                                    Vested Ratio
                                                                    ------------

            Prior to Initial Vesting Date                                 0

            On Initial Vesting Date, provided the Optionee
            is continuously employed by a Participating Company
            from the Date of Option Grant until the Initial
            Vesting Date                                                 25%

            Plus

            For each full month of the Optionee's continuous
            employment by a Participating Company from the
            Initial Vesting Date                                      2.084%

            In no event shall the Vested Percentage exceed 100%.

            (g) "Option Term Date" shall mean the date ten (10) years after the
Date of Option Grant.


                                      A-1
<PAGE>

            (h) On any given date, the number of "Vested Shares" shall be equal
to the Number of Option Shares multiplied by the Vested Percentage determined as
of such date pursuant to paragraph 2(f) above and rounded down to the nearest
whole share. On such date, the number of "Unvested Shares" shall be equal to the
Number of Option Shares reduced by the number of Vested Shares as of such date.

            (i) As to any individual Option granted hereunder, the Board and/or
Committee, referred to in Section 3(a) below, shall have authority under
Sections 7, 12 and 21 of the Plan to include vesting provisions which result in
a different Vested Percentage or Vested Ratio than are set forth in Section 2(f)
above.

      3. Administration.

            (a) Administration by Board and/or Committee. The Plan shall be
administered by the Board of Directors of the Company (the "Board") and/or by a
duly appointed committee of the Board having such powers as shall be specified
by the Board. If appointed, the committee shall consist of no fewer than two
members of the Board, none of whom may be an officer or other salaried employee
of the Company or an officer or other salaried employee of any affiliate of the
Company. Any subsequent references herein to the Board shall also mean the
committee if such committee has been appointed and, unless the powers of the
committee have been specifically limited, the committee shall have all of the
powers of the Board granted herein, including, without limitation, the power to
terminate or amend the Plan at any time, subject to the terms of the Plan and
any applicable limitations imposed by law. All determinations by the Board shall
be final and binding upon all persons having an interest in the Option. All
questions of interpretation of the Plan or of any options granted under the Plan
(an "Option") shall be determined by the Board, and such determinations shall be
final and binding upon all persons having an interest in the Plan and/or any
Option.

            (b) Options Authorized. Options may be either incentive stock
options as defined in Section 422 of the Code ("Incentive Stock Options") or
non-statutory stock options. Each option shall be designated as either an
Incentive Stock Option or a non-statutory Stock Option on the Notice of Grant.
In the absence of any designation options granted hereunder shall be
non-statutory Stock Options.

            (c) Authority of Officers. Any officer of a Participating Company
shall have the authority to act on behalf of the Company with respect to any
matter, right, obligation, or election which is the responsibility of or which
is allocated to the Company herein, provided the officer has apparent authority
with respect to such matter, right, obligation, or election.

            (d) Disinterested Administration. With respect to the participation
in the Plan of officers or directors of the Company subject to Section 16 of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Plan shall
be administered by the Board in compliance with the requirements of Rule 16b-3,
as promulgated under the Exchange Act and amended from time to time or any
successor rule or regulation ("Rule 16b-3") if and to the extent still
applicable.

      4. Eligibility.

            (a) Eligible Persons. Options may be granted only to employees
(including officers) and directors of the Participating Company Group or to
individuals who are rendering services as consultants, advisors, or other
independent contractors to the Participating Company Group. The Board shall, in
its sole discretion, determine which persons shall be granted Options (an
"Optionee"). Eligible persons may be granted more than one (l) Option.

            (b) Restrictions on Option Grants. A director of a Participating
Company may only be granted a nonstatutory stock option unless the director is
also an employee of the Participating


                                      A-2
<PAGE>

Company Group. An individual who is rendering services as a consultant, advisor,
or other independent contractor may only be granted a non-statutory stock
option.

      5. Shares Subject to Option.

      Options shall be for the purchase of shares of the authorized but unissued
common stock or treasury shares of common stock of the Company (the "Stock"),
subject to adjustment as provided in paragraph 14 below. The maximum number of
shares of Stock which may be issued under the Plan shall be the sum of twenty
million fifty thousand (20,050,000) shares plus an additional four percent (4%)
of the number of issued and outstanding shares of Stock (but not including
increases resulting from the issuance of shares under the Plan) on each of the
first five annual anniversaries of the Effective Date; provided, however, that
no more than twenty million fifty thousand (20,050,000) shares may be issued
under the Plan pursuant to Incentive Stock Options. In the event that any
outstanding Option for any reason expires or is terminated or canceled and/or
shares of Stock subject to repurchase are repurchased by the Company, the shares
allocable to the unexercised portion of such Option or such repurchased shares,
may again be subject to an Option grant. Notwithstanding the foregoing any such
shares shall be made subject to a new Option only if the grant of such new
Option and the issuance of such shares pursuant to such new Option would not
cause the Plan or any Option granted under the Plan to contravene Rule 16b-3.
During any time when the Company has a class of equity security registered under
Section 12 of the Exchange Act, the maximum number of shares of Stock subject to
Options that can be awarded under the Plan to any person eligible for an Option
granted under the Plan is one million (1,000,000) per year.

      6. Time for Granting Options. The Plan shall have no termination date;
provided, however, that all Incentive Stock Options shall be granted, if at all,
within ten (10) years of January 13, 2000.

      7. Terms Conditions and Form of Options. Subject to the provisions of the
Plan, the Board shall determine for each Option (which need not be identical)
the number of shares of Stock for which the Option shall be granted, the
exercise price of the Option, the timing and terms of exercisability and vesting
of the Option, the time of expiration of the Option, the effect of the
Optionee's termination of employment or service, whether the Option is to be
treated as an Incentive Stock Option or as a non-statutory stock option, the
method for satisfaction of any tax withholding obligation arising in connection
with Option, including by the withholding or delivery of shares of stock, and
all other terms and conditions of the Option not inconsistent with the Plan.
Options granted pursuant to the Plan shall be evidenced by written notices
specifying the number of shares of Stock covered thereby, in such form as the
Board shall from time to time establish, which notices may incorporate all or
any of the terms of the Plan by reference and shall comply with and be subject
to the following terms and conditions:

            (a) Exercise Price. The exercise price for each Option shall be
established in the sole discretion of the Board; provided, however, that (i) the
exercise price per share for an Incentive Stock Option shall be not less than
the fair market value, as determined by the Board, of a share of Stock on the
date of the granting of the Option; (ii) the exercise price per share for a
non-statutory stock option shall not be less than eighty-five percent (85%) of
the fair market value, as determined by the Board, of a share of Stock on the
date of the granting of the Option; and (iii) no Incentive Stock Option granted
to an Optionee who at the time the Option is granted owns stock possessing more
than ten percent (10%) of the total combined voting power of all classes of
stock of a Participating Company within the meaning of Section 422(b)(6) of the
Code (a "Ten Percent Owner Optionee") shall have an exercise price per share
less than one hundred ten percent (110%) of the fair market value, as determined
by the Board, of a share of Stock on the date of the granting of the Option.
Notwithstanding the foregoing, an Option (whether an Incentive Stock Option or a
non-statutory stock option) may be granted with an exercise price lower than the
minimum exercise price set forth above if such Option is granted pursuant to an
assumption or substitution for another option in a manner qualifying with the
provisions of Section


                                      A-3
<PAGE>

424(a) of the Code.

            (b) Exercise Period of Options. The Board shall have the power to
set, including by amendment of an Option, the time or times within which each
Option shall be exercisable or the event or events upon the occurrence of which
all or a portion of each Option shall be exercisable and the term of each
Option; provided, however, that (i) no Option shall be exercisable after the
expiration of ten (10) years after the date such Option is granted, and (ii) no
Incentive Stock Option granted to a Ten Percent Owner Optionee shall be
exercisable after the expiration of five (5) years after the date such Option is
granted.

            (c) Right to Exercise. The Option shall be first exercisable on and
after the Initial Vesting Date, and then only to the extent vested.
Notwithstanding the foregoing, the Option may be exercised only in multiples of
twenty-five (25) shares unless all shares subject to the Option are being
exercised; provided, however, that the foregoing restriction shall not apply so
as to prevent an exercise (i) following the Optionee's termination of employment
as set forth in paragraph 10 below or (ii) during the thirty (30) day periods
immediately preceding and following a Transfer of Control as defined in
paragraph 15 below.

            (d) Method of Exercise. Exercise of the Option must be by written
notice to the Company which must state the election to exercise the Option, the
number of shares for which the Option is being exercised and such other
representations and agreements as to the Optionee's investment intent with
respect to such shares as may be required pursuant to the provisions of the
Plan. The written notice must be signed by the Optionee and must be delivered in
person, by certified or registered mail, return receipt requested, or by
confirmed facsimile transmission, to the Chief Financial Officer of the Company,
or other authorized representative of the Participating Company Group, prior to
the termination of the Option as set forth in paragraph 6 below, accompanied by
(i) full payment of the exercise price for the number of shares being purchased
and (ii) an executed copy, if required herein, of the then current forms of
escrow and security agreements referenced below.

            (e) Payment of Exercise Price.

                  (i) Forms of Payment Authorized. Payment of the exercise price
for the number of shares of Stock being purchased pursuant to any Option shall
be made (1) in cash, by check, or cash equivalent, (2) by tender to the Company
of shares of the Company's stock owned by the Optionee having a fair market
value, as determined by the Board (but without regard to any restrictions on
transferability applicable to such stock by reason of federal or state
securities laws or agreements with an underwriter for the Company), not less
than the exercise price, (3) by the assignment of the proceeds of a sale of some
or all of the shares being acquired upon the exercise of the Option (including,
without limitation, through an exercise complying with the provisions of
Regulation T as promulgated from time to time by the Board of Governors of the
Federal Reserve System), or (4) by any combination thereof. The Board may at any
time or from time to time grant Options which do not permit all of the foregoing
forms of consideration to be used in payment of the exercise price and/or which
otherwise restrict one or more forms of consideration.

                  (ii) Tender of Company Stock. Notwithstanding the foregoing,
an Option may not be exercised by tender to the Company of shares of the
Company's stock to the extent such tender of stock would constitute a violation
of the provisions of any law, regulation and/or agreement restricting the
redemption of the Company's stock or, if in the opinion of Company counsel,
might impair the ability of purchasers of stock from the Company from taking
full advantage of the provisions of Section 1202 of the Code relating to capital
gains treatment of stock issued by the Company. Unless otherwise provided by the
Board, an Option may not be exercised by tender to the Company of shares of the
Company's stock unless such shares of the Company's stock either have been owned
by the Optionee for more than six (6) months or were not acquired, directly or
indirectly, from the Company.


                                      A-4
<PAGE>

                  (iii) Assignment of Proceeds of Sale. The Company reserves, at
any and all times, the right, in the Company's sole and absolute discretion, to
establish, decline to approve and/or terminate any program and/or procedures for
the exercise of Options by means of an assignment of the proceeds of a sale of
some or all of the shares of Stock to be acquired upon such exercise.

            (f) Tax Withholding. At the time the Option is exercised, in whole
or in part, or at any time thereafter as requested by the Company, the Optionee
by accepting the grant of the Option shall be considered to have authorized
payroll withholding and otherwise agreed to make adequate provision for foreign,
federal and state tax withholding obligations of the Company, if any, which
arise in connection with the Option, including, without limitation, obligations
arising upon (i) the exercise, in whole or in part, of the Option, (ii) the
transfer, in whole or in part, of any shares acquired on exercise of the Option,
or (iii) the operation of any law or regulation providing for the imputation of
interest, or (iv) the lapsing of any restriction with respect to any shares
acquired on exercise of the Option. The Optionee is cautioned that the Option is
not exercisable unless the Company's withholding obligations are satisfied.
Accordingly, the Optionee may not be able to exercise the Option when desired
even though the Option is vested and the Company shall have no obligation to
issue a certificate for such shares.

            (g) Certificate Registration. Except in the event the exercise price
is paid by Immediate Sales Proceeds, the certificate or certificates for the
shares as to which the Option is exercised shall be registered in the name of
the Optionee, or, if applicable, the heirs of the Optionee.

            (h) Restrictions on Grant of the Option and Issuance of Shares. The
grant of the Option and the issuance of shares upon exercise of the Option shall
be subject to compliance with all applicable requirements of federal, state or
foreign law with respect to such securities. The Option may not be exercised if
the issuance of shares upon such exercise would constitute a violation of any
applicable federal, state or foreign securities laws or other law or
regulations. In addition, the Option may not be exercised unless (i) a
registration statement under the Securities Act of 1933, as amended (the
"Securities Act"), shall at the time of exercise of the Option be in effect with
respect to the shares issuable upon exercise of the Option, or (ii) in the
opinion of legal counsel to the Company, the shares issuable upon exercise of
the Option may be issued in accordance with the terms of an applicable exemption
from the registration requirements of the Securities Act. THE OPTIONEE IS
CAUTIONED THAT THE OPTION MAY NOT BE EXERCISABLE UNLESS THE FOREGOING CONDITIONS
ARE SATISFIED. ACCORDINGLY, THE OPTIONEE MAY NOT BE ABLE TO EXERCISE THE OPTION
WHEN DESIRED EVEN THOUGH THE OPTION IS VESTED. Questions concerning this
restriction should be directed to the Chief Financial Officer or the General
Counsel of the Company. As a condition to the exercise of the Option, the
Company may require the Optionee to satisfy any qualifications that may be
necessary or appropriate, to evidence compliance with any applicable law or
regulation, and to make any representation or warranty with respect thereto as
may be requested by the Company.

            (i) Fractional Shares. The Company shall not be required to issue
fractional shares upon the exercise of the Option.

      8. Non-Transferability of the Option; Non-Alienation of Benefits. The
Option may be exercised during the lifetime of the Optionee only by the Optionee
and may not be assigned or transferred in any manner except by will or by the
laws of descent and distribution. Following the death of the Optionee, the
Option, to the extent unexercised and exercisable by the Optionee on the date of
death, may be exercised by the Optionee's legal representative or by any person
empowered to do so under the deceased Optionee's will or under the then
applicable laws of descent and distribution.

      Except with the prior written consent of the Company, subject to the
foregoing, or as otherwise provided herein, no right or benefit under this
Option Plan shall be subject to anticipation, alienation, sale, assignment,
pledge, encumbrance or charge, and any attempt to anticipate, alienate, sell,
assign, pledge, encumber or charge the same without such consent, if applicable,
shall be void. Except with


                                      A-5
<PAGE>

such consent, no right or benefit under this Option Plan shall in any manner be
liable for or subject to the debts, contracts, liabilities or torts of the
person entitled to such benefit. Except to the extent previously approved by the
Company in writing, or as otherwise provided herein, if the Optionee should
become bankrupt or attempt to anticipate, alienate, sell, assign, pledge,
encumber or charge any right or benefit hereunder, then such right or benefit
shall cease and terminate, and in such event, the Company may hold or apply the
same or any part thereof for the benefit of the Optionee, the Optionee's spouse,
children or other dependents, or any of them, in such manner and in such
proportion as the Company may in its sole determination deem proper.

      9. Termination of the Option. The Option shall terminate and may no longer
be exercised on the first to occur of (a) the Option Term Date as defined above,
(b) the last date for exercising the Option following termination of employment
as described in paragraph 10 below, or (c) a Transfer of Control to the extent
provided in paragraph 15 below.

      10. Termination of Employment.

            (a) Termination Other Than by Death or Disability. Except as
otherwise provided below, if the Optionee ceases to be an employee of the
Participating Company Group for any reason, except death or disability within
the meaning of section 422(c) of the Code, the Option, to the extent unexercised
and exercisable by the Optionee on the date on which the Optionee ceased to be
an employee, may be exercised by the Optionee within thirty (30) days after the
date on which the Optionee's employment terminated, but in any event no later
than the Option Term date.

            (b) Termination by Death or Disability. Except as otherwise provided
below, if the Optionee's employment with the Company is terminated because of
the death or disability of the Optionee within the meaning of section 422(c) of
the Code, the Option, to the extent unexercised and exercisable by the Optionee
on the date on which the Optionee ceased to be an employee, may be exercised by
the Optionee (or the Optionee's legal representative) at any time prior to the
expiration of twelve (12) months from the date on which the Optionee's
employment terminated, but in any event no later than the Option Term Date. The
Optionee's employment shall be deemed to have terminated on account of death if
the Optionee dies within three (3) months after the Optionee's termination of
employment.

            (c) Limitations on Exercise After Termination. Except as provided in
this paragraph 10, the Option shall terminate and may not be exercised after the
Optionee ceases to be an employee of the Participating Company Group.
Furthermore, the Board may at any time after the Optionee's termination of
employment cancel the Option with respect to all or a portion of the shares
otherwise remaining exercisable under the Option, if the Company finds or has
found that the Optionee:

                  (i) Engaged in willful, deliberate or gross misconduct toward
the Company;

                  (ii) Has violated the terms of any confidentiality agreement
or obligation between the Optionee and the Company; or

                  (iii) Has accepted employment with an entity which the Company
determines is in a business that could result in compromising any
confidentiality agreement or obligation between the Optionee and the Company.

            (d) Employee and Termination of Employment Defined. For purposes of
this paragraph 10, the term "employee" shall mean any person, including officers
and directors, employed by a Participating Company or performing services for a
Participating Company as a director, consultant, advisor or other independent
contractor. For purposes of this paragraph 10, the Optionee's employment shall
be deemed to have terminated if the Optionee ceases to be employed by a
Participating Company (whether upon an actual termination of employment or upon
the Optionee's employer ceasing to be a


                                      A-6
<PAGE>

Participating Company). The Optionee's employment shall not be deemed to have
terminated merely because of a change in the capacity in which the Optionee
serves as an employee, provided that there is no interruption or termination of
the Optionee's service as an employee.

            (e) Extension if Exercise Prevented by Law. Notwithstanding the
foregoing, if the exercise of the Option within the applicable time periods set
forth above is prevented by the provisions of paragraph 7(h) above, the Option
shall remain exercisable until three (3) months after the date the Optionee is
notified by the Company that the Option is exercisable, but in any event no
later than the Option Term Date.

            (f) Extension if Optionee Subject to Section 16(b). Notwithstanding
the foregoing, if the exercise of the Option within the applicable time periods
set forth above would subject the Optionee to suit under Section 16(b) of the
Exchange Act, the Option shall remain exercisable until the earliest to occur of
(i) the tenth (10th) day following the date on which the Optionee would no
longer be subject to such suit, (ii) the one hundred and ninetieth (190th) day
after the Optionee's termination of employment, or (iii) the Option Term Date.

            (g) Leave of Absence. For purposes hereof, the Optionee's employment
with the Participating Company Group shall not be deemed to terminate if the
Optionee takes any military leave, sick leave, or other bona fide leave of
absence approved by the Company of ninety (90) days or less. In the event of a
leave in excess of ninety (90) days, the Optionee's employment shall be deemed
to terminate on the ninety-first (91st) day of the leave unless the Optionee's
right to reemployment with the Participating Company Group remains guaranteed by
statute or contract. Notwithstanding the foregoing, unless otherwise designated
by the Company (or required by law) a leave of absence shall not be treated as
employment for purposes of determining the Optionee's Vested Percentage.

      11. Standard Forms of Stock Options.

            (a) Incentive Stock Options. Unless otherwise provided for by the
Board at the time an Option is granted, an Option designated as an "Incentive
Stock Option" shall comply with and be subject to the terms and conditions set
forth herein.

            (b) Non-statutory Stock Options. Unless otherwise provided for by
the Board at the time an Option is granted, an Option designated as a
"Non-statutory Stock Option" shall comply with and be subject to the terms and
conditions set forth herein.

            (c) Standard Term for Options. Unless otherwise provided for by the
Board in the grant of an Option, any Option granted hereunder shall be
exercisable for a term of ten (10) years.

      12. Authority to Vary Terms. The Board shall have the authority from time
to time to vary the terms of an individual stock option grant either in
connection with the grant or amendment of an individual Option or in connection
with the authorization of a new standard form or forms of Notice of Grant;
provided, however, that the terms and conditions of such revised or amended
standard form or forms shall be in accordance with the terms of the Plan.

      13. Fair Market Value Limitation. To the extent that the aggregate fair
market value (determined at the time the Option is granted) of stock with
respect to which Incentive Stock Options are exercisable by an Optionee for the
first time during any calendar year (under all stock option plans of the
Company, including the Plan) exceeds One Hundred Thousand Dollars ($100,000),
such Options shall be treated as non-statutory stock options. This paragraph
shall be applied by taking Incentive Stock Options into account in the order in
which they were granted.

      14. Effect of Change in Stock Subject to Plan. Appropriate adjustments
shall be made in the number and class of shares of Stock subject to the Plan and
to any outstanding Options and in the exercise price of any outstanding Options
in the event of a stock dividend, stock split, reverse stock split,


                                      A-7
<PAGE>

recapitalization, combination, reclassification or like change in the capital
structure of the Company.

      In the event a majority of the shares which are of the same class as the
shares that are subject to outstanding Options are exchanged for, converted
into, or otherwise become (whether or not pursuant to a Transfer of Control (as
defined below)) shares of another corporation (the "New Shares"), the Company
shall unilaterally amend the outstanding Options to provide that such Options
are exercisable for New Shares. In the event of any such amendment, the number
of shares and the exercise price of the outstanding Options shall be adjusted in
a fair and equitable manner.

      15. Transfer of Control. A "Transfer of Control" shall be deemed to have
occurred in the event any of the following occurs with respect to the Company.

            (a) the direct or indirect sale or exchange by the stockholders of
the Company of all or substantially all of the stock of the Company where the
stockholders of the Company before such sale or exchange do not retain, directly
or indirectly, at least a majority of the beneficial interest in the voting
stock of the Acquiring Corporation as defined below after such sale or exchange;

            (b) a merger or consolidation where the stockholders of the Company
before such merger or consolidation do not retain, directly or indirectly, at
least a majority of the beneficial interest in the voting stock of the Acquiring
Corporation as defined below after such merger or consolidation;

            (c) the sale, exchange, or transfer of all or substantially all of
the assets of the Company (other than a sale, exchange, or transfer to one (1)
or more subsidiary corporations (as defined in paragraph 1 above) of the
Company); or

            (d) a liquidation or dissolution of the Company.

      Each Optionee shall be credited, as of the proposed effective date of a
Transfer of Control, and if still employed by the Company on the date such
Transfer of Control is consummated, with the greater of (i) twelve (12) full
months of additional vesting of the shares subject to his/her Option or (ii) the
number of months of additional vesting of the shares subject to his/her Option
as the Board shall have designated in the Optionee's Notice of Grant on the Date
of Option Grant.

      Furthermore, in the event of a Transfer of Control, the surviving,
continuing successor, or purchasing corporation or parent corporation thereof,
as the case may be (the "Acquiring Corporation"), shall either assume the
Company's rights and obligations under outstanding stock option agreements or
substitute options for the Acquiring Corporation's stock for such outstanding
Options. In the event the Acquiring Corporation elects not to assume or
substitute for such outstanding Options in connection with the Transfer of
Control, any unexercisable and/or unvested shares subject to such outstanding
stock option agreements shall be immediately exercisable and fully vested as of
the date thirty (30) days prior to the proposed effective date of the Transfer
of Control. The exercise and/or vesting of any Option that was permissible
solely by reason of this paragraph 15 shall be conditioned upon the consummation
of the Transfer of Control. Any Options which are neither assumed or substituted
for by the Acquiring Corporation in connection with the Transfer of Control nor
exercised as of the date of the Transfer of Control shall terminate and cease to
be outstanding effective as of the date of the Transfer of Control.

      16. Rights as a Stockholder or Employee. The Optionee shall have no rights
as a stockholder with respect to any shares covered by the Option until the date
of the issuance of a certificate or certificates for the shares for which the
Option has been exercised. No adjustment shall be made for dividends or
distributions or other rights for which the record date is prior to the date
such certificate or certificates are issued, except as provided in paragraph 14
above. Nothing in the Option shall confer upon the Optionee any right to
continue in the employ of a Participating Company or interfere in any way with
any right of the Participating Company Group to terminate the Optionee's
employment at any time.

      17. Stock Dividends Subject to Plan. If, from time to time, there is any
stock dividend, stock split,


                                      A-8
<PAGE>

or other change in the character or amount of any of the outstanding stock of
the corporation the stock of which is subject to the provisions of the Plan,
then in such event any and all new, substituted or additional securities to
which the Optionee is entitled by reason of the Optionee's ownership of the
shares acquired upon exercise of the Option shall be immediately subject to any
security interest held by the Company with the same force and effect as the
shares subject to such security interest immediately before such event.

      18. Legends. The Company may at any time place legends referencing any
applicable federal, state or foreign securities law restrictions on all
certificates representing shares of stock subject to the provisions of the Plan.
The Optionee shall, at the request of the Company, promptly present to the
Company any and all certificates representing shares acquired pursuant to the
Option in the possession of the Optionee in order to carry out the provisions of
this paragraph.

      19. Provision of Information. Each Optionee shall be given access to
information concerning the Company equivalent to that information made available
to the Company's common stockholders generally.

      20. Options Non-Transferable. During the lifetime of the Optionee, the
Option shall be exercisable only by the Optionee. No Option shall be assignable
or transferable by the Optionee, except by will or by the laws of descent and
distribution.

      21. Termination or Amendment of Plan or Options. The Board, including any
duly appointed committee of the Board, may terminate or amend the Plan or any
Option at any time; provided, however, that without the approval of the
Company's stockholders, there shall be (a) no increase in the total number of
shares of Stock covered by the Plan (except by operation of the provisions of
paragraph 14 above), (b) no change in the class eligible to receive Incentive
Stock Options and (c) no expansion in the class eligible to receive
non-statutory stock options. In addition to the foregoing, the approval of the
Company's stockholders shall be sought for any amendment to the Plan for which
the Board deems stockholder approval necessary in order to comply with Rule
16b-3. In any event, no amendment may adversely affect any then outstanding
Option or any unexercised portion thereof, without the consent of the Optionee,
unless such amendment is required to enable an Option designated as an Incentive
Stock Option to qualify as an Incentive Stock Option.

      IN WITNESS WHEREOF, the undersigned Secretary of the Company certifies
that the foregoing CIENA Corporation Third Amended and Restated 1994 Stock
Option Plan was duly adopted by the Board of Directors of the Company on the
13th day of January, 2000.


                                           /s/ Michael O. McCarthy III
                                           ----------------------------------
                                           Michael O. McCarthy III, Secretary


                                      A-9
<PAGE>


                                                                      1562-PS-00
<PAGE>


                                      PROXY

                                CIENA CORPORATION
               Proxy Solicited on behalf of the Board of Directors
            Annual Meeting of Stockholders to be held March 16, 2000

      The undersigned hereby appoints Patrick H. Nettles, Joseph R. Chinnici and
Michael O. McCarthy III, or any of them, the proxies of the undersigned, with
full power of substitution, to vote all shares of Common Stock of CIENA
Corporation which the undersigned is entitled to vote at the Annual Meeting of
Stockholders of the Corporation to be held March 16, 2000, or any adjournment
thereof, as follows:

1. Election of Two Directors by all Stockholders

      |_| FOR all nominees listed below      |_| WITHHOLD AUTHORITY to
          except as marked to the contrary       vote for all nominees
                                                 listed below

      Stephen P. Bradley, Ph.D. and Gerald H. Taylor

      (Instruction: To withhold authority to vote for any individual nominee,
      write that nominee's name on the space provided below):

- --------------------------------------------------------------------------------

2. Proposal to approve the CIENA Corporation Third Amended and Restated 1994
Stock Option Plan.

      |_| FOR                  |_| AGAINST             |_| ABSTAIN

3. Proposal to amend the Corporation's Third Restated Certificate of
Incorporation to increase the number of shares of Common Stock authorized for
issuance thereunder from 360 million shares to 460 million shares.

      |_| FOR                  |_| AGAINST             |_| ABSTAIN

4. Proposal to ratify the selection of PricewaterhouseCoopers LLP as independent
public accountants for the Corporation.

      |_| FOR                  |_| AGAINST             |_| ABSTAIN

5. The proxies are authorized to vote in their discretion on any other matters
which may properly come before the Annual Meeting to the extent set forth in the
proxy statement.

  The Board of Directors recommends a vote "FOR" each of the listed proposals.

      PLACE AN "X" HERE IF YOU PLAN TO VOTE YOUR SHARES AT THE MEETING. |_|

Execute proxy exactly as your name appears on this form. If stock is registered
in more than one name, each joint holder should sign. When signing as trustee,
executor or other fiduciary, please so indicate:


- -------------------       -------------------------------       ----
Signature of holder       Signature of co-holder (if any)       Date



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