一种新的光反转归零码-差分正交相移键控调制方案  

A Novel Scheme for Optical Inverse Return-to-Zero-Differential Quadrature Phase-Shift-Keying Modulation

作　　者：文爱军[1] 吕亮[1] 杨蕾[1] 尚磊[1] 李晓军[2] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [2]西安电子科技大学理学院,陕西西安710071

出　　处：《中国激光》2010年第11期2872-2878,共7页Chinese Journal of Lasers

基　　金：国家973计划(2010CB328300);高等学校学科创新引智计划(D08038)资助课题

摘　　要：提出一种新的光反转归零码-差分正交相移键控(IRZ-DQPSK)调制方案,该方案所产生的IRZ信号相位连续,易于与相位调制信号相结合,占空比和消光比均可调。并仿真分析了单信道40 Gb/s长距离传输时,自相位调制(SPM)对幅移键控-差分正交相移键控(ASK-DQPSK)与IRZ-DQPSK两种信号的影响。结果表明,40 Gb/s长距离传输时,IRZ-DQPSK具有更好的抗SPM性能。A novel scheme to generate inverse return-to-zero-differential quadrature phase-shift-keying（IRZ-DQPSK） modulation format is introduced.The IRZ signal generated in this scheme does not contain any original phase information,so it is convenient to combine IRZ modulation with the phase modulation,and both the duty cycle and the extinction ratio of the IRZ-DQPSK signal are tunable.The influence of self phase modulation（SPM） is compared between IRZ-DQPSK and amplitude shift keying-differential quadrature phase-shift-keying（ASK-DQPSK） in a 40Gb/s single channel long distance transmission by simulation.Results show that IRZ-DQPSK signal offers much better performance against SPM.

关 键 词：光通信 幅度相位联合调制 反转归零码 差分正交相移键控 自相位调制 

分 类 号：TN929.11[电子电信—通信与信息系统]