TITLE:
Analysis of the Performance of Optical Code-Division Multiple-Access System (OCDMA), Operating with Gold Codes under Nonlinear Effects
AUTHORS:
Glendo de Freitas Guimarães, Agliberto Melo Bastos, Alisson da Conceição Ferreira, Alex Sander Barros Queiroz, José Wally Mendonça Menezes, José Rubens Rodrigues de Sousa, Antonio Sergio Bezerra Sombra
KEYWORDS:
Fiber Bragg Grating; Gold Code; OCDMA; All-Optical Digital Processing of Signals
JOURNAL NAME:
Journal of Electromagnetic Analysis and Applications,
Vol.5 No.2,
February
28,
2013
ABSTRACT: A numerical simulation study of
the performance of encoding and decoding of short optical pulse in OCDMA (Optical
Code Division Multiple Access) systems under non-linear optical effects is presented. The performance of encoding and decoding short pulses
is obtained through use of device FBG (fiber Bragg grating) where the codes are
inserted through discrete jumps in the optical phase (±π). The multiuser interference is also the object of the
present study, where a figure of merit (interference figure) is used to quantify
the interference in multiuser auto and cross correlation. We evaluate the dependence
of the multiuser interference for the coupling constant of FBG. Finally, the interference
inserted in the autocorrelation due to nonlinear effects generated in the nonlinear
switching of the coded pulse in a dual core nonlinear directional coupler is examined,
where temporal broadening
of pulses decoded is observed.