40Gb/sWDM系统中RZ&NRZ调制格式的性能比较  

Performance Comparison between RZ&NRZ Modulation Formats in 40 Gb/s WDM System

作　　者：张慧剑[1] 左萌[1] 孙学明[1] 顾畹仪[1] 

机构地区：[1]北京邮电大学光通信中心,北京100876

出　　处：《光通信技术》2004年第12期44-46,共3页Optical Communication Technology

基　　金：国家自然科学基金项目(90104003;60372096);国家863计划项目;教育部科学技术研究重点项目(104044)

摘　　要：利用数值计算的方法对40GWDM系统进行了仿真。在考虑了光纤群速度色散(GVD)、三阶色散(TOD)、自相位调制(SPM)、交叉相位调制(XPM)、四波混频(FWM)和偏振模色散(PMD)的前提下,通过对比眼图和Q因子,对归零码(RZ)和非归零码(NRZ)调制格式的传输性能进行了研究。A 40 Gb/s WDM system is numerically simulated. The performance of RZ and NRZ modulation formats are evaluated by comparing eye diagram and Q-factor, considering group velocity dispersion (GVD),third order dispersion (TOD),self-phase modulation (SPM), cross-phase modulation (XPM), four wave mixing (FWM) and polarization mode dispersion (PMD).Though RZ formats are more robust against nonlinearity, it should be taken into account in system design that RZ formats are more sensitive to PMD and the crosstalk from neighborchannels.

关 键 词：光纤通信 调制格式 数值仿真 归零码 非归零码 波分复用 

分 类 号：TN929.11[电子电信—通信与信息系统]