光传输中RZ-ODPASK调制格式的SPM效应及其补偿研究  

SPM Effect and Its Compensation of RZ-ODPASK Modulation Format in Optical Transmission

作　　者：李晓军[1] 文爱军[1] 刘增基[1] 岳鹏[1] 翟万腾[1] 刘姣姣[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室

出　　处：《光子学报》2008年第9期1848-1851,共4页Acta Photonica Sinica

基　　金：高等学校学科创新引智计划(B08038);华为科技基金资助

摘　　要：研究了单信道40Gbps归零八进制差分相位幅度调制格式(Return-to-zero Octal Phaseamplitude-shift Keying,RZ-ODPASK)光传输系统中,自相位调制(Self-phase Modulation,SPM)效应对于相位支路差分解调性能的影响.理论推导了相邻两个不同幅度的码元由于SPM效应,产生的非线性相移差表达式.提出了一种非线性相移差预补偿方法.仿真结果表明,该方法能够有效降低相位支路解调信号的眼张开代价,提高RZ-ODPASK长距离通信系统的传输性能.For optical single-channel transmission system of 40 Gbs RZ-ODPASK modulation format, the influence of self-phase modulation （SPM） effect on the differential phase demodulation performance of phase tributary is studied. Expression for the difference of two adjacent symbols＇ nonlinear-phase-shift, owning to SPM effect, is analytically derived. Based on this result, one kind of phase precompensation method is suggested. Simulation results show that this scheme can effectively decrease the eye-opening penalty of the phase tributary of RZ-ODPASK system, and can improve the performance of RZ-ODPASK long-haul transmission system.

关 键 词：光通信 多电平调制 ODPASK SPM 相位调制 

分 类 号：TN929.11[电子电信—通信与信息系统]