16进制相移幅度调制光信号的传输性能研究  

Transmission Performance Study of 16-ary Phase-amplitude Modulated Optical Signal

作　　者：李晓军[1,2] 刘增基[1] 文爱军[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 [2]西安电子科技大学理学院,西安710071

出　　处：《光子学报》2010年第4期704-708,共5页Acta Photonica Sinica

基　　金：高等学校学科创新引智计划(B08038)资助

摘　　要：分析了光纤通信系统中十六进制差分相移幅度键控光信号的色散与非线性传输性能.依据该信号的调制和解调原理,理论上推导了背靠背系统中的最佳消光比值为1.43dB.在此基础上,建立了40Gbps的十六进制差分相移幅度键控光传输系统模型.仿真结果表明:该信号的谱宽仅为二进制幅度键控的四分之一;就抗色散和非线性传输性能表现而言,十六进制差分相移幅度键控光信号的相位支路均强于幅度支路.The chromatic dispersion and nonlinear performances of 16DPASK modulation format in optical communication are analyzed. Based on the modulation and demodulation principles of this optical signal, the optimal extinction ratio for back-to-back configuration is theoretically derived as 1.43 dB,which is verified by simulation. Then transmission system model of 16DPASK is established. Simulation results show that the spectrum width of 16DPASK is one quarter of that of BASK. Both the chromatic dispersion and nonlinear tolerances of phase tributary are larger than that of amplitude tributary.

关 键 词：光通信 相移键控 光纤 色散 非线性光学 

分 类 号：TN929.11[电子电信—通信与信息系统]