DWDM光纤通信系统中受激喇曼散射的统计特性  

Study on Statistical Characteristics of Stimulated Raman Scattering in DWDM Fiber Communication Systems

作　　者：刘毓[1] 张小燕[1] 梁青[1] 孙爱晶[1] 孙亚尼[1] 

机构地区：[1]西安邮电学院通信工程系,西安710061

出　　处：《半导体光电》2009年第6期907-912,917,共7页Semiconductor Optoelectronics

基　　金：陕西省自然科学基金项目(2006F16);国家自然科学基金项目(60677005)

摘　　要：随着通信容量的增大,密集波分复用(DWDM)光纤通信系统中的受激喇曼散射(SRS)非线性效应成为影响系统质量的重要因素。采用时域分步法模型,对色散下的SRS统计特性进行了深入研究,得到了在整码元色散走离时,DWDM系统各信道传输功率的统计特性,推导了各信道传输功率的数学期望、标准差,证实了各信道传输功率符合高斯分布,计算了概率密度函数,并且与仿真数据取得了较好的一致。With the enlargement of communication capacity, the performance of dense wavelength division multiplexed （DWDM） fiber communication systems might be degraded by nonlinear effect of stimulated Raman scattering （SRS） in the optical fiber. To resolve these problems, the time-domain split-step method is applied to investigate the statistical characteristics of SRS. The mean and the standard deviation of transmission powers of all channels are derived analytically in a closed-form formula for DWDM systems with SRS and integer bits dispersion walk-off. The probability density function （PDF） of output powers of all channels is confirmed to be Gaussian distribution. The numerical results show a good correspondence with analytical formulae.

关 键 词：受激喇曼散射 光纤色散 密集波分复用 非线性光学 

分 类 号：O437[机械工程—光学工程]