UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549


                                    FORM 8-K


                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


     Date of report (Date of earliest event reported)    March 1, 2007
                                                         -----------------------

                                Ciena Corporation
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)


                                    Delaware
- --------------------------------------------------------------------------------
                 (State or Other Jurisdiction of Incorporation)


                0-21969                                 23-2725311
- --------------------------------------------------------------------------------
        (Commission File Number)               (IRS Employer Identification No.)


            1201 Winterson Road, Linthicum, MD                  21090
- --------------------------------------------------------------------------------
         (Address of Principal Executive Offices)             (Zip Code)


                                 (410) 865-8500
- --------------------------------------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


- --------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))

ITEM 2.02 - RESULTS OF OPERATIONS AND FINANCIAL CONDITION On March 1, 2007, Ciena Corporation issued a press release announcing its financial results for the first fiscal quarter ended January 31, 2007. The text of the press release is furnished as Exhibit 99.1 to this Report. The information in this Report shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any registration statement pursuant to the Securities Act of 1933, as amended. ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS (c) The following exhibit is being filed herewith: Exhibit Number Description of Document -------------- ----------------------- Exhibit 99.1 Text of Press Release dated March 1, 2007, issued by Ciena Corporation, reporting its results of operations for the first fiscal quarter ended January 31, 2007.

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Ciena Corporation Date: March 1, 2007 By: /S/ Russell B. Stevenson, Jr. ------------------------------------ Russell B. Stevenson, Jr. Senior Vice President, General Counsel and Secretary

                                                                    Exhibit 99.1

           Ciena Reports Fiscal First Quarter 2007 Results

Company Delivers Twelfth Straight Quarter of Sequential Revenue Growth


    LINTHICUM, Md.--(BUSINESS WIRE)--March 1, 2007--Ciena(R)
Corporation (NASDAQ:CIEN), the network specialist, today announced
results for its fiscal first quarter 2007 ended January 31, 2007.
Revenue for the first quarter totaled $165.1 million, representing a
3.2% sequential increase from fiscal fourth quarter revenue of $160.0
million, and an increase of 37.1% over the same period a year ago when
the Company reported sales of $120.4 million.

    On the basis of generally accepted accounting principles (GAAP),
Ciena's net income for the fiscal first quarter 2007 was $11.1
million, or net income of $0.12 per diluted share. This compares with
a reported GAAP net loss of $6.3 million, or a net loss of $0.08 per
share, for the same period a year ago.

    "As bandwidth demands escalate across multiple traffic types,
service provider and enterprise customers alike are increasingly
looking for solutions that allow them to transition their networks
toward powerful converged network architectures capable of delivering
any service at any time," said Gary Smith, Ciena's president and CEO.
"Ciena's differentiated positioning as the transition specialist and
our FlexSelect(TM) vision of next-generation networks are driving
demand for our solutions worldwide, enabling us to deliver our twelfth
sequential quarter of revenue growth."

    Non-GAAP Presentation of Quarterly Results

    In evaluating the operating performance of its business, Ciena's
management excludes certain charges and credits that are required by
GAAP. These items, which are identified in the table that follows (in
thousands except per share data), share one or more of the following
characteristics: they are unusual and Ciena does not expect them to
recur in the ordinary course of its business; they do not involve the
expenditure of cash; they are unrelated to the ongoing operation of
the business in the ordinary course; or their magnitude and timing is
largely outside of the Company's control.


                                             Quarter        Quarter
                                              Ended          Ended
                                           January 31,    January 31,
                                          -------------  -------------
                                              2006           2007
                                          -------------  -------------
Stock-based compensation-product          $        135   $        221
Stock-based compensation-services                  188            193
Stock-based compensation-research and
 development                                     1,637            743
Stock-based compensation-sales and
 marketing                                       1,046          1,040
Stock-based compensation-general and
 administrative                                    821          1,000
Amortization of intangible assets                6,295          6,295
Restructuring costs (recoveries)                 2,015           (466)
Long-lived asset impairment                         (3)             -
Recovery of doubtful accounts, net              (2,604)           (10)
Gain on lease settlement                        (6,020)             -
Loss on equity investments, net                    733              -
Gain on extinguishment of debt                  (6,690)             -
                                          -------------  -------------
Total adjustments                         $     (2,447)  $      9,016
                                          =============  =============

GAAP net income (loss)                    $     (6,291)  $     11,056
Adjustment for items above                      (2,447)         9,016
                                          -------------  -------------
Adjusted (non-GAAP) net (loss) income     $     (8,738)  $     20,072
                                          =============  =============
Weighted average basic common shares
 outstanding                                    82,967         84,953
Weighted average dilutive potential
 common shares outstanding                      82,967         93,259

Adjusted (non-GAAP) net (loss) income per
 share                                    $      (0.11)  $       0.22

Please see Appendix A for additional information about this table.


    Adjusting Ciena's unaudited fiscal first quarter 2007 GAAP net
income of $11.1 million for the items noted above would increase the
Company's adjusted (non-GAAP) net income in the quarter to $20.1
million, or an adjusted (non-GAAP) net income of $0.22 per adjusted
diluted share. This compares with an adjusted (non-GAAP) net loss of
$8.7 million, or an adjusted (non-GAAP) net loss of $0.11 per share,
in the same year-ago period.

    First Quarter 2007 Performance Highlights

    --  Achieved sequential quarterly revenue growth of 3.2% and
        year-over-year quarterly revenue growth of 37.1%.

    --  Delivered overall gross margin of 44.6% and product gross
        margin of 48.7%.

    --  Ended the fiscal first quarter 2007 with cash, cash
        equivalents and short- and long-term investments of $1.2
        billion.

    First Quarter 2007 Customer Highlights

    --  Verizon Business chose Ciena's CoreDirector(R) Multiservice
        Optical Switches to build a trans-Atlantic mesh network.

    --  Hargray Communications selected Ciena's CN 4200(TM) FlexSelect
        Advanced Services Platform to converge its regional transport
        network and deliver quad-play and business services.

    --  Cox Communications deployed Ciena's CoreDirector Multiservice
        Optical Switches in the super headend of its San Diego network
        to interconnect two metro rings.

    --  Cogeco Cable became Ciena's first cable network deployment in
        Canada with its use of the CN 4200 for its core infrastructure
        upgrade.

    --  USCarrier Telecom, LLC selected Ciena's CN 4200 to support
        multiservice aggregation for metropolitan and regional
        transport services.

    Business Outlook

    "Furthering our efforts to provide customers with a unique formula
for facilitating network transition, we recently announced Ethernet
enhancements to our FlexSelect Architecture, including new products,"
said Smith. "We're excited about the new opportunities we're targeting
with these new features and platforms, which we expect to contribute
to revenue growth this fiscal year, and we're even more excited about
the increasing alignment we see between Ciena's comprehensive
FlexSelect vision and the strategic direction in which our customers'
networks are headed."

    "During the last several years we've invested significantly to
create a targeted solutions portfolio with the unified vision that
Ethernet is the most efficient and economical foundation for
next-generation, service-enabled networks," said Smith. "Whether
incorporated in new features on our traditional optical platforms or
forming the foundation of a completely new product, our FlexSelect
vision already is a driving force behind our revenue growth and will
be a factor in what we expect to be a five to ten percent sequential
increase in revenue from our fiscal first quarter to our fiscal second
quarter."

    Live Web Broadcast of Fiscal First Quarter Results

    Ciena will host a discussion of its fiscal first quarter results
with investors and financial analysts today, Thursday, March 1, 2007
at 8:30 a.m. (Eastern). The live broadcast of the discussion will be
available via Ciena's homepage at www.ciena.com. An archived version
of the discussion will be available shortly following the conclusion
of the live broadcast on the Investor Relations page of Ciena's
Web site at: http://www.ciena.com/investors/investors.htm.

    NOTE TO INVESTORS

    This press release contains certain forward-looking statements
based on current expectations, forecasts and assumptions that involve
risks and uncertainties. These statements are based on information
available to the Company as of the date hereof; and Ciena's actual
results could differ materially from those stated or implied, due to
risks and uncertainties associated with its business, which include
the risk factors disclosed in its Report on Form 10-K filed with the
Securities and Exchange Commission on January 10, 2007.
Forward-looking statements include statements regarding Ciena's
expectations, beliefs, intentions or strategies regarding the future
and can be identified by forward-looking words such as "anticipate,"
"believe," "could," "estimate," "expect," "intend," "may," "should,"
"will," and "would" or similar words. Forward-looking statements in
this release include: we're excited about the new opportunities we're
targeting with these new features and platforms, which we expect to
contribute to revenue growth this fiscal year, and we're even more
excited about the increasing alignment we see between Ciena's
comprehensive FlexSelect vision and the strategic direction in which
our customers' networks are headed; during the last several years
we've invested significantly to created a broad, yet targeted
solutions portfolio with the unified vision that Ethernet is the most
efficient and economical foundation for next-generation,
service-enabled networks; whether incorporated in new features for our
traditional optical platforms or the foundation of a completely new
product, our FlexSelect vision already is a driving force behind our
revenue growth and will be a factor in what we expect to be a five to
seven percent sequential increase in revenue from our fiscal first
quarter to our fiscal second quarter. Ciena assumes no obligation to
update the information included in this press release, whether as a
result of new information, future events or otherwise.

    (Unaudited Condensed Consolidated Balance Sheets, Statement of
                   Operations and Cash Flows follow)


                          CIENA CORPORATION
                CONDENSED CONSOLIDATED BALANCE SHEETS
                  (in thousands, except share data)
                             (unaudited)
ASSETS
                                             October 31,  January 31,
                                             ------------ ------------
Current assets:                                  2006         2007
                                             ------------ ------------
  Cash and cash equivalents                  $   220,164  $   374,079
  Short-term investments                         628,393      496,628
  Accounts receivable, net                       107,172      139,422
  Inventories, net                               106,085      103,548
  Prepaid expenses and other                      36,372       46,400
                                             ------------ ------------
    Total current assets                       1,098,186    1,160,077
Long-term investments                            351,407      314,377
Equipment, furniture and fixtures, net            29,427       32,867
Goodwill                                         232,015      232,015
Other intangible assets, net                      91,274       84,011
Other long-term assets                            37,404       38,309
                                             ------------ ------------
    Total assets                             $ 1,839,713  $ 1,861,656
                                             ============ ============

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                           $    39,277  $    37,997
  Accrued liabilities                             79,282       90,065
  Restructuring liabilities                        8,914        7,621
  Unfavorable lease commitments                    8,512        7,614
  Income taxes payable                             5,981        6,298
  Deferred revenue                                19,637       20,015
                                             ------------ ------------
    Total current liabilities                    161,603      169,610
Long-term deferred revenue                        21,039       22,847
Long-term restructuring liabilities               26,720       24,579
Long-term unfavorable lease commitments           32,785       30,691
Other long-term obligations                        1,678        1,582
Convertible notes payable                        842,262      842,262
                                             ------------ ------------
    Total liabilities                          1,086,087    1,091,571
                                             ------------ ------------
Commitments and contingencies
Stockholders' equity:
  Preferred stock - par value $0.01;
   20,000,000 shares authorized; zero shares
   issued and outstanding                              -            -
  Common stock - par value $0.01;
   140,000,000 shares authorized; 84,891,656
   and 85,054,714 shares issued and
   outstanding                                       849          851
  Additional paid-in capital                   5,505,853    5,511,921
  Changes in unrealized gains on
   investments, net                                 (496)      (1,001)
  Translation adjustment                            (580)        (742)
  Accumulated deficit                         (4,752,000)  (4,740,944)
                                             ------------ ------------
    Total stockholders' equity                   753,626      770,085
                                             ------------ ------------
  Total liabilities and stockholders' equity $ 1,839,713  $ 1,861,656
                                             ============ ============


                          CIENA CORPORATION
           CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                (in thousands, except per share data)
                             (unaudited)

                                             Quarter Ended January 31,
                                             -------------------------
                                                 2006         2007
                                             ------------ ------------
Revenues:
  Products                                   $   105,941  $   146,282
  Services                                        14,489       18,819
                                             ------------ ------------
Total revenue                                    120,430      165,101
                                             ------------ ------------

Costs:
  Products                                        60,399       74,979
  Services                                         9,576       16,494
                                             ------------ ------------
Total cost of goods sold                          69,975       91,473
                                             ------------ ------------
  Gross profit                                    50,455       73,628
                                             ------------ ------------
Operating expenses:
  Research and development                        29,462       29,853
  Selling and marketing                           26,572       24,875
  General and administrative                       9,896       10,301
  Amortization of intangible assets                6,295        6,295
  Restructuring costs (recoveries)                 2,015         (466)
  Long-lived asset impairments                        (3)           -
  Recovery of doubtful accounts, net              (2,604)         (10)
  Gain on lease settlement                        (6,020)           -
                                             ------------ ------------
    Total operating expenses                      65,613       70,848
                                             ------------ ------------
Income (loss) from operations                    (15,158)       2,780
Interest and other income, net                     9,262       14,845
Interest expense                                  (6,053)      (6,148)
Loss on equity investments, net                     (733)           -
Gain on extinguishment of debt                     6,690            -
                                             ------------ ------------
Income (loss) before income taxes                 (5,992)      11,477
Provision for income taxes                           299          421
                                             ------------ ------------
Net income (loss)                            $    (6,291) $    11,056
                                             ============ ============
Basic net income (loss) per common share     $     (0.08) $      0.13
                                             ============ ============
Diluted net income (loss) per potential
 common share                                $     (0.08) $      0.12
                                             ============ ============
Weighted average basic common shares
 outstanding                                      82,967       84,953
                                             ============ ============
Weighted average dilutive potential common
 shares outstanding                               82,967       93,259
                                             ============ ============


                          CIENA CORPORATION
           CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (in thousands)
                             (unaudited)

                                        Three Months Ended January 31,
                                        ------------------------------
                                             2006           2007
                                        -------------- ---------------
Cash flows from operating activities:
  Net income (loss)                     $      (6,291) $       11,056
  Adjustments to reconcile net income
   (loss) to net cash used in operating
   activities:
  Early extinguishment of debt                 (6,690)              -
  Amortization of premium (discount) on
   marketable securities                        1,176          (1,249)
  Non-cash loss from equity investments           733               -
  Depreciation and amortization of
   equipment, furniture and fixtures            5,312           3,150
  Stock compensation                            4,183           3,289
  Amortization of intangibles                   7,263           7,263
  Provision for inventory excess and
   obsolescence                                 3,000           4,763
  Provision for warranty and other
   contractual obligations                      2,470           4,791
  Other                                           608             715
  Changes in assets and liabilities:
    Accounts receivable                        (8,350)        (32,250)
    Inventories                               (18,046)         (2,226)
    Prepaid expenses and other                 10,151         (11,289)
    Accounts payable and accrued
     liabilities                              (30,813)         (1,810)
    Income taxes payable                           61             317
    Deferred revenue and other
     obligations                                3,195           2,186
                                        -------------- ---------------
Net cash used in operating activities         (32,038)        (11,294)
                                        -------------- ---------------
Cash flows from investing activities:
  Additions to equipment, furniture,
   fixtures and intellectual property          (4,375)         (6,590)
  Restricted cash                               1,102            (521)
  Purchases of available for sale
   securities                                 (63,641)        (88,632)
  Maturities of available for sale
   securities                                 136,219         258,171
                                        -------------- ---------------
Net cash provided by investing
 activities                                    69,305         162,428
                                        -------------- ---------------
Cash flows from financing activities:
  Repayment of convertible notes
   payable                                    (98,772)              -
  Proceeds from exercise of stock
   options                                      2,117           2,781
                                        -------------- ---------------
Net cash provided by (used in)
 financing activities                         (96,655)          2,781
                                        -------------- ---------------
Net increase (decrease) in cash and
 cash equivalents                             (59,388)        153,915
Cash and cash equivalents at beginning
 of period                                    358,012         220,164
                                        -------------- ---------------
Cash and cash equivalents at end of
 period                                 $     298,624  $      374,079
                                        ============== ===============

    Appendix A

    The adjustments management makes in analyzing Ciena's fiscal first
quarter 2007 GAAP results are as follows:

    --  Stock-based compensation costs - A non-cash expense incurred
        in accordance with SFAS 123R using the modified prospective
        application transition method.

    --  Amortization of intangible assets - a non-cash expense arising
        from acquisitions of intangible assets, principally developed
        technology, which Ciena is required to amortize over its
        expected useful life.

    --  Restructuring costs (recoveries) - infrequent charges or
        recoveries incurred as the result of reducing the size of the
        Company's operations to align its resources with the reduced
        size of the telecommunications market as well as the result of
        targeting new segment opportunities within the overall market,
        which the Company feels are not reflective of its ongoing
        operating costs.

    --  Long-lived asset impairment - infrequent charges, incurred as
        a result of excess equipment classified as held for sale which
        the Company feels are not reflective of its ongoing operating
        costs.

    --  Recovery of doubtful accounts - an infrequent gain unrelated
        to normal operations resulting from the recovery of a
        previously assessed doubtful payment due to a customer's
        financial condition.

    --  Gain on lease settlement - an infrequent gain unrelated to
        normal operations resulting from termination of obligations
        under a lease for an unused facility.

    --  Loss on equity investments, net - an infrequent loss related
        to changes in the value of the Company's equity investments
        which the Company feels is not reflective of its ongoing
        operating costs.

    --  Gain on extinguishment of debt - an infrequent gain related to
        the early extinguishment of outstanding debt.

    About Ciena

    Ciena Corporation is the network specialist, focused on expanding
the possibilities for its customers' networks while reducing their
cost of ownership. The Company's systems, software and services target
and cure specific network pain points so that telcos, cable operators,
governments and enterprises can best exploit the new applications that
are driving their businesses forward. For more information, visit
www.ciena.com.

    CONTACT: Ciena Corporation
             Press Contact:
             Nicole Anderson, 410-694-5786
             pr@ciena.com
             or
             Investor Contact:
             Jessica Towns, 888-243-6223
             ir@ciena.com