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

作     者：Glendo de Freitas Guimaraes Agliberto Melo Bastos Alisson da Conceicao Ferreira Alex Sander Barros Queiroz Jose Wally Mendonca Menezes Jose Rubens Rodrigues de Sousa Antonio Sergio Bezerra Sombra 

作者机构：Laboratorio de Telecomunicacoes e Ciencia e Engenharia dos Materiais(LOCEM)Departamento de FisicaUniversidade Federal do Ceara(UFC)FortalezaBrazil Laboratorio Especializado em Sistema de Telecomunicacoes e Ensino(LESTE)Departamento de TelematicaInstituto Federal do Ceara(IFCE)Campus FortalezaFortalezaBrazil Grupo de Fisica Aplicada e Docencia(GFAD)Instituto Federal do Ceara(IFCE)Campus SobralSobralBrazil Departamento de Engenharia de Teleinformatica(DETI)Centro de TecnologiaUniversidade Federal do Ceara(UFC)FortalezaBrazil Departamento de Engenharia de EnergiasUniversidade da Integracao Internacional da Lusofonia Afro-Brasileira(UNILAB)RedencaoBrazil 

出 版 物：《Journal of Electromagnetic Analysis and Applications》 (电磁分析与应用期刊（英文）)

年 卷 期：2013年第5卷第2期

页      面：49-57页

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：CNPq FUNCAP CAPES FINEP for the financial support 

主　　题：Fiber Bragg Grating Gold Code OCDMA All-Optical Digital Processing of Signals 

摘      要：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.