脉冲波形对级联相敏放大器光传输系统性能的影响  

Effect of Signal Pulse Shape on Transmission Performance of Cascaded In Line PSA Optical Fiber Communication System

作　　者：林洪榕[1] 陈如全[1] 

机构地区：[1]南京邮电学院通信工程系,南京210003

出　　处：《光学学报》2001年第8期939-943,共5页Acta Optica Sinica

基　　金：江苏省自然科学基金资助课题

摘　　要：研究了相敏光放大器 (PSA)中抽运光和信号光之间存在相位漂移时 ,信号脉冲波形对级联相敏光放大器光纤通信系统传输性能的影响。通过系统仿真 ,得到了在不同的相位漂移下高速信号脉冲眼图劣化度随光纤色散变化的曲线 ,以及在给定的光纤色散下放大器有相移与无相移时信号眼图劣化度随信号脉冲指数变化的曲线。由仿真结果可知 ,脉冲波形不同对系统性能的影响亦不同。采用超高斯脉冲的系统性能优于采用高斯脉冲 。The effect of signal pulse shape on the transmission performance is studied for an optical fiber communication system with cascaded in-line optical phase-sensitive amplifiers (PSA's) having phase shifting between pumping and signal light. Computer simulation shows that at different phase shifting the eye-pattern degradation of high-speed signal increases rapidly with the accretion of fiber dispersion, and changes with signal pulse shape for given fiber dispersion. From the simulating results, it is known that signal pulse shape also affect the system performance. The system transmission performance of using super Gaussian pulse is superior to that of using Gaussian pulse, and super Gaussian pulse has an optimum pulse exponent for best transmission performance.

关 键 词：相敏光放大器 色散补偿 相位漂移 脉冲波形 光传输系统 光纤通信 

分 类 号：TN929.11[电子电信—通信与信息系统]