用偏振模色散模拟器加偏振片实现带内光信噪比检测  

In-band OSNRmonitoring with polarization mode dispersion emulator and polarizer

作　　者：席丽霞[1] 彭文雨[1] 杨松[1] 翁轩[1] 张霞[1,2] 张晓光[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 [2]聊城大学光通信科学与技术省重点实验室,山东聊城252000

出　　处：《光电子．激光》2014年第1期51-55,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61205065)资助项目

摘　　要：提出了一种基于偏振模色散(PMD)模拟器加偏振片的带内检测光信噪比(OSNR)的方法,理论分析了检测方法的工作原理,证明了方法不受光纤链路色散和PMD的影响,并且与信号偏振态、调制格式及传输速率无关。测试结果表明:在9dB到34dB的测量范围内,本文检测方法的测量误差在0.5dB内;在1dB的测量误差范围内,对偏振相关损耗(PDL)的容忍范围为1dB。Optical signal to noise ratio （OSNR） is one of the key o ptical performa nce indicators for the efficient operation and maintenance of optical communicat ion systems or optical networks.However,for high efficiency transmission systems or modern d ynamically reconfigurable networks,the conventional linear interpolation techniq ue for measuring the OSNR has become unsuitable due to t he accu mulated noise levels be quite different from channel to channel.So many researchers have attempted to develop new techniques of monitor ing the true value of OSNR in recent years.In this paper,an in-band OSNR m onitoring method based on polarization mode dispersion emulator and polarizer is proposed and analyzed.Theoretical ana lysis proves that this method is independent of both polarization mode dispersion （PMD） and chromatic dispersion （CD）,and transparent to both bit rate and modula tion formats.Simulation results show that this method has a measurement range from 9dB to 34dB within accuracy of ±0.5dB,and 1dB polarization dependent loss tolerance with 1dB measured e rror.

关 键 词：光通信 光信噪比(OSNR) 偏振模色散(PMD)模拟器 偏振片 

分 类 号：TN913.7[电子电信—通信与信息系统]