EP 1097536 A1 20010509 - OPTICAL CDMA USING A CASCADED MASK STRUCTURE
Title (en)
OPTICAL CDMA USING A CASCADED MASK STRUCTURE
Title (de)
OPTISCHES CDMA MIT KASKADIERTER MASKENSTRUKTUR
Title (fr)
AMCR OPTIQUE RECOURANT A UNE STRUCTURE DE MASQUAGE EN CASCADE
Publication
Application
Priority
- US 0012235 W 20000505
- US 13445199 P 19990517
- US 37147599 A 19990810
Abstract (en)
[origin: WO0076102A1] Optical CDMA transmitters and receivers include a spatial modulator using a fiber grating filter device encoded with CDMA code defined by the presence or absence of gratings at defined frequency positions. The presence of a fiber grating filter spanning a range near a particular chip frequency defines a "bit 0" chip and the absence of a fiber grating filter at another chip frequency designates the "bit 1" chip. The combination of gratings selectively provided over the sequence of chip positions along the fiber defines the CDMA code. This fiber grating filter device can be viewed as a cascade of many band-stop grating filters each corresponding to the CDMA code bit in the spectral domain. Consequently, a CDMA transmitter includes two components, a data modulator that modulates a broadband optical source, e.g., an erbidium doped fiber source (EDFS) or a super luminescent diode (SLD), and a fiber grating filter device to selectively pass and block portions of the spectrum of the broadband optical source. The optical CDMA-encoded output of this transmitter is then output to an optical network.
IPC 1-7
IPC 8 full level
H04B 10/556 (2013.01); H04B 10/00 (2013.01); H04J 14/00 (2006.01)
CPC (source: EP KR)
H04B 10/00 (2013.01 - KR); H04B 10/25 (2013.01 - KR); H04B 10/50 (2013.01 - KR); H04B 10/60 (2013.01 - KR); H04J 14/005 (2013.01 - EP)
Citation (search report)
See references of WO 0076102A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0076102 A1 20001214; AU 4701600 A 20001228; BR 0006171 A 20020205; CA 2338027 A1 20001214; EP 1097536 A1 20010509; JP 2003501945 A 20030114; KR 20010071960 A 20010731; RU 2001104442 A 20030127
DOCDB simple family (application)
US 0012235 W 20000505; AU 4701600 A 20000505; BR 0006171 A 20000505; CA 2338027 A 20000505; EP 00928840 A 20000505; JP 2001502259 A 20000505; KR 20017000759 A 20010117; RU 2001104442 A 20000505