偏分复用系统中偏振模色散补偿与偏分解复用一体化方案  

A combined scheme of polarization mode dispersion compensation and polarization de-multiplexing in a polarization division multiplexing system with direct detection

作　　者：林嘉川[1] 席丽霞[1] 张霞[1,2] 田凤[1] 梁晓晨[1] 张晓光[1] 

机构地区：[1]信息光子学与光通信国家重点实验室,北京邮电大学,北京100876 [2]山东省光通信科学与技术省重点实验室,聊城大学,聊城252000

出　　处：《物理学报》2013年第11期293-300,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61205065);高等学校博士学科点专项科研基金(批准号:20110005110014);深圳市科技研发资金基础研究计划(批准号:JC201105191003A);山东省自然基金项目(批准号:ZR2010FM043)资助的课题~~

摘　　要：本文建立了偏分复用系统中偏振模色散与信号偏振态变化引起信道串扰的数学模型,分析了偏振模色散对偏分复用信道射频功率的影响,并提出了适用于偏分复用系统的光域偏振模色散补偿与偏分解复用同时进行的方案:用信道的射频功率作为反馈控制信号,监测链路中偏振模色散和偏振态变化引起的信道串扰的大小,用改进的粒子群优化算法对偏振控制器进行自适应控制,同时完成偏振模色散补偿与偏分解复用.在112Gb/s偏分复用-差分正交相移键控(PDM-DQPSK)传输系统中仿真验证了该方案的有效性.结果表明该方案可以使112Gb/s-PDM-DQPSK传输系统完成自适应偏分解复用的同时,在1dB的光信噪比代价下,使系统对偏振模色散的容忍度提高20ps.A model of polarization mode dispersion （PMD） and state of polarization （SOP） variation induced coherent crosstalk is established in a polarization division multiplexing system. The properties of radio frequency power of one channel in the presence of PMD are investigated. A combined scheme of PMD compensation and polarization de-multiplexing in optical domain is proposed, which is based on monitoring of the feedback signal of RF power. A modified particle swarm optimization algorithm is also used for the adaptive polarization control. The validity of the PMD compensation and polarization de-multiplexing scheme proposed here is demonstrated in a 112Gb/s-PDM-DQPSK simulation system. Results show that the PMD tolerance of the transmission system is increased by 20 ps with 1 dB OSNR margin and the channel separation is accomplished as well.

关 键 词：偏分复用系统 信道串扰 偏振模色散 偏分解复用 

分 类 号：TN929.11[电子电信—通信与信息系统]