SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 19, 2004 Date of Report (Date of earliest event reported) CIENA Corporation (Exact name of registrant as specified in its charter) Delaware 0-21969 23-2725311 (State or other jurisdiction (Commission File No.) (IRS Employer of incorporation) Identification No.) 1201 Winterson Road, Linthicum, Maryland 21090 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 865-8500 Not applicable (Former name or former address, if changed since last report) Exhibit Index on Page 2 TABLE OF CONTENTS Item 5. Other Events and Regulation FD Disclosure ------------------------------------------------- SIGNATURES EXHIBIT INDEX EX-99.1 Text of Press Release -------------------------------------------------------------------------------- ITEM 5. OTHER EVENTS AND REGULATION FD DISCLOSURE On August 19, 2004, CIENA Corporation issued a press release announcing that Michael J. Rowny has been elected to CIENA's board of directors. The text of the press release is furnished as Exhibit 99.1 to this Report. Exhibits -- The following exhibit is furnished as part of this Report: Exhibit 99.1 -- Text of Press Release filed under Item 5 by CIENA Corporation, dated August 19, 2004. -2- 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 Dated: August 19, 2004 By: /s/ Russell B. Stevenson, Jr. ---------------------------------------------- Senior Vice President, General Counsel and Secretary -3-