全光纤高速模拟信号偏振态测量系统的研究  

Research on All Optical Fiber High-speed Analog Signal Polarization State Measurement System

作　　者：孙明璇[1] 王健[1] 邱敏[1] 尚超[1] 李善勇[1] 

机构地区：[1]北京交通大学发光与光信息技术教育部重点实验室光信息科学与技术研究所,北京100044

出　　处：《光电技术应用》2015年第2期17-22,共6页Electro-Optic Technology Application

基　　金：国家自然科学基金(61275075);北京市自然科学基金(4132035)资助课题

摘　　要：全光纤高速偏振态测量,尤其是模拟信号的偏振态高速测量在光纤通信和光纤传感等领域中有着重要应用。在深入研究光电探测器放大电路的基础上,搭建了基于光纤偏振控制器（PC）、偏振分束器（PBS）以及模拟光电探测器的全光纤高速偏振态测量系统。用搭建的系统对0~50 MHz模拟信号的偏振态进行了测量,并与商用偏振分析仪进行了误差比较。实验表明,此偏振态测量系统可实现速率0~50 MHz模拟信号Stokes参量的准确测量,显示在邦加球上的测量误差半径在0.03以下,与商用偏振分析仪处于同一量级。系统重复性良好,且可测模拟信号的速率远超目前商用偏振分析仪,为许多待测光为模拟信号的光纤传感系统提供了有效的测量手段。All optical fiber high-speed state of polarization （SOP） measurement, especially the high-speed SOP measurement of analog signal, has important applications in optical fiber communications and sensing areas. Based on deeply researching on amplifying circuit of the photoelectric detector, an all optical fiber high-speed SOP mea-surement system is developed on the basis of a polarization controller （PC）, a polarization beam splitter （PBS） and a photoelectric detector. The SOP of 0-50 MHz analog signal is measured by the system and the errors are compared with that of a commercial polarization analyzer （PA）. Experimental results show that the SOP measurement system can accurately measure Strokes parameters of 0-50 MHz analog signal and the error radius on the Poincar6 sphere is less than 0.03, which is the same order of magnitude as that of commercial PA. The system has good repeatability, and the measure rate is faster than that of the current commercial PA. So it provides an effective mean for fiber sensing systems which use the light to be measured as analog signals.

关 键 词：光偏振态测量 模拟信号 Stokes参量 

分 类 号：O436.3[机械工程—光学工程] TP212.14[理学—光学]