4×10Gb/s OTDM系统中偏振模色散自适应补偿的研究

利用信号偏振度为反馈信号，基于可变步长最大值搜索算法实现了4×10?Gb/s 光时分复用 （OTDM）系统偏振模色散（PMD）自适应跟踪补偿实验.PMD补偿器为偏振控制器加可变时延 线的四自由度结构.最大差分群时延（DGD）补偿量为25?ps，即信号的一个比特周期，补偿 时间小于50?ms. 关键词： 偏振模色散 光时分复用系统 偏振度 自适应补偿

Dynamic PMD compensation in 4×10Gb/s optical time-division multiplexed transmission system

Using the degree of polarization as feedback signal to detect the polarization m ode dispersion (PMD) variation in the fiber links, an experiment of dynamic adap tive PMD compensation in 4×10?Gb/s optical time-division multiplexed (OTDM) tr ansmission system is reported. The PMD compensator consists of a polarization co ntroller and a variable delay line with four degrees of freedom. Based on the va riable step-size peek search algorithm, the performance of the PMD compensator i s assessed in the eye pattern of a received signal. It is shown that the maximum compensated differential group delay is 25?ps, i.e. one bit period, and the co mpensation time can be less than 50?ms.
Keywords： polarization mode dispersion OTDM transmission system degree of p olarization adaptive compensation