弹光调制器（Photoelastic Modulator, PEM）互差频调制的新型偏振测量方法, 能够同时实现三个斯托克斯光谱偏振参数测量, 克服了现有方法的无法用阵列探测器有效采集, 调制频率高的缺点, 保留了原有弹光调制器偏振测量的优点。文章以光学系统的准单色光的偏振特性以及常用的偏振分析方法为基础, 引入了Stokes矢量来表示入射光波的偏振特性。分析了弹光调制器实现偏振测量新方法的原理, 利用三个弹光调制器工作在互相差异的频率上, 对偏振光进行差频调制, 产生载有偏振信息的低频分量, 再通过锁相放大即可得到偏振信息, 并给出利用MATLAB模拟仿真实现Stokes参量复原的过程。理论分析及仿真结果证明了该方法在理论上的可行性。

Photoelastic Modulator mutual difference frequency modulation of new polarization measurement method can realize three stokes spectrum polarization parameters measurement, overcomes that the existing methods can't use array detector effective collection and modulation frequency high faults and Retains the advantages of the original play of light modulator polarization measurement. This chapter is based on polarization properties and General polarization analysis method of optical system of monochromatic, Stokes vector is introduced to represent the polarization of the incident light wave characteristics. Analysis Photoelastic modulator for polarization works, Three photoelastic modulators work on the mutual difference frequency, polarized light is modulated to the difference frequency, polarization information is contained in the low-frequency component and via phase-locked amplification can get polarized information. This paper proposed by MATLAB simulation realization Stokes vector recovery process. Theoretical analysis and simulation results show that the method in the theoretical feasibility.