偏振模色散补偿控制中偏振度技术的性能(英文)

Performance of DOP Technique Used to Control PMD Compensation

基于主偏振态理论,导出了光信号偏振度的解析表达式.并对40Gb/s光传输系统中的信号偏振度受各种因素的影响进行了数值模拟,包括啁啾、脉冲形状、脉冲宽度、自发辐射噪声以及消光比等.结果表明,偏振度技术能有效地监测和控制40Gb/s系统中小于37.5ps的偏振模色散.而且发现就最大化偏振度技术对差分群延时的容许范围而言,脉冲的1/e强度半宽取0.45个位宽(11.25ps)是最优的.

Based on principal state of polarization （PSP） theory, an analytical expression of the degree of polarization （DOP） of optical signal is obtained. The effects of various factors on signal DOP degradation are presented by numerical simulation for 40 Gb/s optical transmission system. The results show that DOP technique is able to effectively monitor and control polarization mode dispersion （PMD） compensation of 40Gb/s optical transmission system with the different group delay （DGD） less than 37. 5 ps. Furthermore, an optimal pulse width is found with regard to maximizing the tolerable DGD range, which is 1/e-intensity half width equal to 0. 45 bit period （11.25 ps）.