弹光调制测Stokes参量研究及仿真  

Photoelastic Modulation Measuring Stokes Parameter Research and Simulation

作　　者：高婷婷[1,2] 韩慧莲[1] 王志斌[2] 张瑞[2] 陈友华[2] 马志飞[3] 

机构地区：[1]中北大学电子测量技术国家重点实验室,太原030051 [2]中北大学山西省光电信息与仪器工程技术研究中心,太原030051 [3]中北大学机电工程学院,太原030051

出　　处：《光电工程》2013年第4期113-119,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金仪器专项基金(611127015);国家自然科学基金项目(61040062);国际科技合作项目(S2012ZR0247)

摘　　要：为了获取目标的偏振信息,设计弹光调制(Photoelastic Modulator,PEM)互差频调制的新型偏振测量方法。该方法将三个PEM分别工作于数值略有差异的三个不同的频率上,对偏振光进行差频调制,产生载有偏振信息的低频分量,最后通过锁相放大即可同时实现四个斯托克斯偏振参数测量,斯托克斯参量可全面描述光束的偏振态。该方法不仅保留了原有弹光调制器偏振测量的优点,并且克服了现有方法无法用阵列探测器有效采集及调制频率高等缺点,同时给出利用MATLAB模拟仿真实现Stokes参量测量的过程。通过理论分析及仿真结果证明了该方法的可行性。In order to get access to the target polarization information, a new polarization measurement method of a modulation mutual difference frequency modulation is designed. In this method, The three Photoelastic Modulator （PEM） respectively work in numerical slightly in three difference frequency, polarized light is modulated to the difference frequency, and polarization information is contained in the low-frequency component. Then, through the lock-in amplifier, the four stokes polarization parameters measurement can be achieved, and Stokes parameter can describe the polarization of the light beam state. This method not only retains the original advantages of elastic-optic modulator for polarization measurements, but also overcomes the defects of the existing method which cannot use array detector effective acquisition and frequency modulation high. Moreover, the method proposed by MATLAB simulation realizes Stokes parameter measurement process. Theoretical analysis and simulation results proved the feasibility of this method.

关 键 词：Stokes参量 弹光调制器 偏振测量 差频调制 

分 类 号：O436.3[机械工程—光学工程]