光通信中ODPASK调制格式的色散性能分析  

Chromatic dispersion performance analysis of ODPASK modulation format in optical communication

作　　者：李晓军[1] 文爱军[1] 刘增基[1] 尚韬[1] 翟万腾[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室

出　　处：《西安电子科技大学学报》2008年第5期823-829,共7页Journal of Xidian University

基　　金：高等学校学科创新引智计划资助(B08038);华为科技基金资助

摘　　要：研究了单信道系统中120 Gbit/s八进制差分相位幅度调制格式(ODPASK)的色散性能.采用眼张开度评价系统性能的方法,推导了背靠背系统的最佳消光比,使得幅度支路和相位支路具有相同的眼张开.在此基础上,研究了各种占空比对于幅度支路与相位支路色散容忍度的影响.仿真结果表明,幅度支路是影响ODPASK传输系统色散损伤的主要因素,幅度支路和相位支路随占空比的增加产生完全相反的眼张开代价变化规律.The chromatic dispersion performance of the 120 Gbit/s ODPASK modulation format is investigated in the single channel system. The optimal back-to-back extinction ratio is derived, so that the equivalent eye opening is obtained for the amplitude tributary and phase tributary. Then the influence of the different duty cycles on the chromatic dispersion tolerance of the two tributaries is studied. Simulation results show that the amplitude tributary mainly degrades the chromatic dispersion performance of the ODPASK transmission system, and that eye-opening penalties of the two tributaries vary inversely with the increasing duty cycle.

关 键 词：光通信 八进制差分相位幅度键控(ODPASK) 色散 啁啾 相位调制 

分 类 号：TN929.11[电子电信—通信与信息系统]