偏分复用系统信道串扰的理论模型及消除方案  

Theoretic Model and Elimination Scheme of Crosstalk in Polarization Division Multiplexing System

作　　者：孙洋[1] 席丽霞[1] 张晓光[1] 秦江星[1] 林嘉川[1] 梁晓晨[1] 

机构地区：[1]北京邮电大学信息光子学与光通信国家重点实验室,北京100876

出　　处：《光学学报》2012年第2期85-91,共7页Acta Optica Sinica

摘　　要：建立了偏分复用(PDM)系统中信道串扰的数学模型,并提出了消除该串扰的方案,即用解复用端一路光信号的射频(RF)功率作为反馈信号以监测光信号在链路中偏振态的变化和在接收端的串扰情况,用粒子群优化(PSO)算法作为逻辑控制单元的算法,控制偏振控制器以消除信道间的串扰。数值仿真了RF功率与信道串扰大小之间的关系,并在2×50Gb/s偏分复用-差分正交移相键控(PDM-DQPSK)传输系统平台上仿真验证了消除串扰方案的效果。结果表明该方案能够大幅降低系统误码率,改善系统性能。A mathematical model of the crosstalk in polarization division multiplexing（PDM） system is induced.An adaptive crosstalk elimination scheme is proposed,in which the radio-frequency（RF） power of the optical signal related with the crosstalk is used as feedback signal and particle swarm optimization（PSO） algorithm is applied in the control unit to adjust the polarization controller and eliminate the crosstalk.The effectiveness is demonstrated in 2×50 Gb/s polarization division multiplexing-differential quadrature phase shift keying（PDM-DQPSK） system.The results show that with the crosstalk elimination scheme the performance of the system is improved remarkably and the bit error rate is reduced greatly.

关 键 词：光通信 偏分复用 信道串扰 射频功率 反馈控制系统 

分 类 号：TN29[电子电信—物理电子学]