Analysis of the Performance of Optical Code-Division Multiple-Access System (OCDMA), Operating with Gold Codes under Nonlinear Effects

Abstract

<p class="MsoNormal" style="text-align:justify;"> <span lang="EN-US">A</span><span lang="EN-US"> </span><span lang="EN">numerical simulation study of the performance of encoding and decoding of short optical pulse in OCDMA (Optical Code Division Multiple Access) </span><span lang="EN-US">systems under non-linear optical effects</span><span lang="EN-US"> </span><span lang="EN">is presented.</span><span lang="EN"> </span><span lang="EN-US">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 (±</span><span lang="PT-BR">π</span><span lang="EN-US">)</span><span lang="EN">. 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 </span><span lang="EN-US">temporal broadening of pulses decoded is observed</span><span lang="EN">.</span><span lang="EN-US"><o:p></o:p></span> </p

Performance Evaluation of a Novel Optimization Sequential Algorithm (SeQ) Code for FTTH Network

“…The code word permits to the transmitter to modulate its data sequences. In order to satisfy faster and more reliable optical communication system requirements and optimize the huge optical bandwidth sharing [4]. The main advantages of OCDMA compared with others techniques are the high capacity for higher connectivity, have more flexible bandwidth usage, higher granularity and scalability within optical networks, capable improved crosstalk performance, asynchronous access, and have potential for improved system security as number of users on the network has specific address code [5].…”