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)  August 30, 2007
                                                   -----------------------------

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

                                    Delaware
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                 (State or Other Jurisdiction of Incorporation)

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


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

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


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          (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 August 30, 2007, Ciena Corporation issued a press release announcing its
financial results for the third fiscal quarter ended July 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 August 30, 2007, issued by
                          Ciena Corporation, reporting its results of operations
                          for the third fiscal quarter ended July 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: August 30, 2007          By:   /S/ Russell B. Stevenson, Jr.
                                     -------------------------------------------
                                     Russell B. Stevenson, Jr.
                                     Senior Vice President, General Counsel and
                                     Secretary