<SEC-DOCUMENT>0001193125-17-239990-index.html : 20170728
<SEC-HEADER>0001193125-17-239990.hdr.sgml : 20170728
<ACCEPTANCE-DATETIME>20170728124344
ACCESSION NUMBER:		0001193125-17-239990
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20170728
DATE AS OF CHANGE:		20170728

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				232725311
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-219060
		FILM NUMBER:		17988950

	BUSINESS ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
		BUSINESS PHONE:		4108658500

	MAIL ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d404402d424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: d404402d424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g404402g83w46.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g404402g83w46.jpg

</DOCUMENT>
</SEC-DOCUMENT>