偏振模色散统计特性的研究  

Investigation on the Statistical Characteristics of Polarization Mode Dispersion

作　　者：郑远[1] 李朝阳[1] 刘秀敏[1] 李锡忠[1] 李荣华[1] 杨伯君[1] 张晓光[1] 

机构地区：[1]北京邮电大学理学院物理部,123信箱北京100876

出　　处：《中国激光》2002年第8期687-690,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(编号 :6 0 0 72 0 4 2 );教育部博士点基金;北京邮电大学校基金资助项目

摘　　要：利用动态方程研究了偏振模色散矢量的统计特性 ,分别用统计系综和频率系综两种方法进行数值模拟。数值结果表明 ,统计系综和频率系综两种方法的结果一致。在大归一化距离条件下 ,均方根时延的平方随归一化距离线性变化 ;偏振模色散矢量的各个分量服从高斯分布 ,差分群时延服从麦克斯韦分布 ;Statistical characteristics of polarization mode dispersion (PMD) are investigated with dynamical equation. Simulations are performed in two methods: statistical ensemble and frequency ensemble. It is shown numerically that the results from the two methods are consistent with each other. Limited by the condition of long normalized distance, the square of rms delay grows linearly with normalized distance; the probability density functions (PDF) of PMD vector's components obey Gauss distribution and the PDF of differential group delay (DGD) time obeys Maxwell distribution; PMD vectors are dispersed on the whole Poincare sphere.

关 键 词：偏振模色散 统计特性 数值模拟 频率系综 

分 类 号：O436.3[机械工程—光学工程]