基于多重重要抽样法的联合偏振效应功率代价计算  

Computation of power penalty due to combined polarization effects using multiple importance sampling

作　　者：符兴昌[1] 刘汉奎[2] 田小兴[2] 

机构地区：[1]四川文理学院物理与工程技术系,达州635000 [2]西华师范大学物理与电子信息学院,南充637002

出　　处：《四川大学学报（自然科学版）》2008年第4期833-837,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：四川省教育厅青年基金(07zb076)

摘　　要：采用重要抽样法研究了偏振模式色散(PMD)和偏振相关损耗(PDL)对10Gbps OOK和DPSK光纤通信系统的影响,计算了在误码率为10-12时的功率代价和系统失效概率.仿真结果表明系统失效概率随偏振相关损耗成指数增长.在其它条件相同的情况下,DPSK系统性能总是优于OOK系统.当设定功率余量为3 dB和失效概率为10-6时,在PMD=20 ps,DPSK和OOK系统对偏振相关损耗忍受度分别可达1.25 dB和0.8 dB左右.The effects of polarization-mode dispersion and polarization-dependent loss on 10 Gbps systems with two modulation formats are investigated using multiple importance sampling. The power penalties at fixed biterror ratio of 10 - 12 and system outages are computed. The simulation results show that the system outage almost increases exponentially with the increase of the polarization-dependent loss. It is found that the differential phase shift keying modulation always performs better than the on-off keying modulation under the same conditions. When 3 dB power margin and 10-6 outage probability are set, the differential phase shift keying and the on-off keying can resist the polarization-dependent loss up to about 1.25 dB and 0.8 dB respectively even if the average polarization-mode dispersion is 20 ps.

关 键 词：光纤通信 偏振模式色散 偏振相关损耗 多重重要抽样法 

分 类 号：TN929.11[电子电信—通信与信息系统]