Open AccessAll-optical differential detection for suppressing multiple-access interference in coherent time-addressed optical CDMA systems
Author(s) -
SunJong Kim,
TaeYoung Kim,
Chul Soo Park,
ChangSoo Park,
Young Yun Chun
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.001848
Subject(s) - interference (communication) , optics , differential (mechanical device) , code division multiple access , physics , optical communication , autocorrelation , computer science , signal (programming language) , electronic engineering , telecommunications , channel (broadcasting) , engineering , mathematics , statistics , thermodynamics , programming language
A novel scheme for suppressing the multiple-access interference (MAI) in coherent time-addressed optical CDMA systems is proposed. This is based on a differential detection using the dual-control NOLM. The basic principle for MAI suppression is described. For experimental demonstration, two encoded channels are constructed and decoded. These decoded signals are sent to the dual-control NOLM and a high autocorrelation peak with suppressed MAI at the output of NOLM is observed. Signal-to-interference ratio is improved by 7 dB.