铌酸锂光电调制器啁啾特性对光通信系统 传输性能的影响  

Effect of chirp characteristics of LiNbO3 modulator on transmission performance of optical communication system

作　　者：梁勤妹 汪徐德[1] LIANG Qinmei;WANG Xude(School of Physics and Electronic Information,Huaibei Normal University,235000,Huaibei,Anhui,PRC)

机构地区：[1]淮北师范大学物理与电子信息学院,安徽省淮北市235000

出　　处：《曲阜师范大学学报（自然科学版）》2020年第3期90-94,共5页Journal of Qufu Normal University(Natural Science)

基　　金：国家自然科学青年基金(11504121);安徽省自然科学基金面上项目(2008085MF211);高校优秀青年人才支持计划(gxyqZD2019034);安徽省教学研究项目(2019jyxm0213);淮北师范大学教学研究项目(JY18023).

摘　　要：在光纤传输系统中,调制器的啁啾特性是衡量调制器性能的重要因素之一.结合色散补偿光纤和后置光放大技术,利用Optisystem仿真软件搭建了一个完整的光纤传输链路,深入研究了铌酸锂调制器的啁啾特性对系统传输性能的影响.通过对不同啁啾系数下Q因子和眼图等参数的比较分析,得出在啁啾系数为0.60时,Q值为27 dB,光纤传输性能最佳.通过讨论色散补偿技术和光放大技术对系统传输性能的影响,得出在色散补偿光纤和光放大器共同作用下,在啁啾系数为0.60时,Q因子最大,误码率最低,眼图清晰,传输性能最佳.因此,研究铌酸锂电光调制技术对提高光纤通信传输性能有重要的意义.The chirp characteristic of modulators is an important index of performances evaluation in optical fiber transmission system.In this paper,on basis of dispersion compensation fiber and post-compensation amplification technique,a complete optical fiber transmission link is built by using Optisystem software.The influence of chirp characteristics of LiNbO3 Mach-Zehnder modulator on system transmission performance is deeply studied.Through the comparison and analysis of Q factors and eye diagrams under different chirp coefficients,it is found that the transmission performance can achieve the optimization,where the chirp coefficient is 0.60 and Q factor is 27 dB.In addition,under the combined effect of dispersion compensation technology and optical amplifier technology,the system has the best performance such as the lower bit error rate(BER),clear eye diagram and larger Q factor of 0.6.Therefore,the study of LiNbO3 modulation technology is of great significance to the optical fiber communication system.

关 键 词：铌酸锂电光调制器 啁啾系数 OPTISYSTEM 

分 类 号：TN914[电子电信—通信与信息系统]