光弹调制互差频偏振测量及误差分析

王志斌; 张瑞; 赵冬娥; 陈友华; 魏海潮

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光弹调制互差频偏振测量及误差分析

现代应用光学 | 更新时间：2020-08-12

- 光弹调制互差频偏振测量及误差分析
- Photoelastic-modulator-based differential frequency polarization modulation measurement and error analysis
- 光学精密工程 2013年21卷第4期页码：876-883
- 作者机构：
  
  中北大学仪器科学与动态测试教育部重点实验室2. 中北大学山西省光电信息与仪器工程技术研究中心
- 作者简介：
- 基金信息：
  
  国际科技合作项目(No.2013DFR10150)
- DOI：
  中图分类号： O436.3
- 收稿日期：2012-10-19，
  
  修回日期：2012-12-26，
  
  网络出版日期：2013-04-20，
  
  纸质出版日期：2013-04-15
- 稿件说明：
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王志斌张瑞赵冬娥陈友华魏海潮. 光弹调制互差频偏振测量及误差分析[J]. 光学精密工程, 2013,21(4): 876-883

WANG Zhi-bin ZHANG Rui ZHAO Dong-e CHEN You-hua WEI Hai-chao. Photoelastic-modulator-based differential frequency polarization modulation measurement and error analysis[J]. Editorial Office of Optics and Precision Engineering, 2013,21(4): 876-883
王志斌张瑞赵冬娥陈友华魏海潮. 光弹调制互差频偏振测量及误差分析[J]. 光学精密工程, 2013,21(4): 876-883 DOI：

WANG Zhi-bin ZHANG Rui ZHAO Dong-e CHEN You-hua WEI Hai-chao. Photoelastic-modulator-based differential frequency polarization modulation measurement and error analysis[J]. Editorial Office of Optics and Precision Engineering, 2013,21(4): 876-883 DOI：

摘要

针对现有光弹调制测量偏振方法无法用普通阵列探测器有效采集锁相频率，难以测量复色光的偏振特性等缺点，提出了一种三光弹调制器互差频调制的新型偏振测量方法。操作时，3个光弹调制器分别工作在频率w

，w

和w

上，三频率大小略有差异，从而可以对光进行差频调制并产生载有被测光偏振信息的低频调制分量(0，

，2

-2

)；然后，通过锁相放大即可以一次测量获得斯托克斯矢量S中的S

，S

和S

。介绍了三光弹调制差频偏振测量的基本原理，通过相应的数值仿真和实验验证了其可行性，并对差频大小、相位延迟幅度等因素对测量结果的误差进行了初步分析。分析表明，该方法不仅保留了原光弹调制偏振测量方法测量精度高等优点，而且调制光电流频率下降了2~3个数量级(10~500 Hz)，普通阵列探测器即可实现探测，在高精度偏振成像技术方面具有潜在的应用价值。

Abstract

A new differential frequency polarization modulation method based on triple-photoelastic-modulators (triple-PEMs) is proposed to overcome the shortcomings like that phase locked frequency is difficult to be measured by common array detectors and the polarization of polychromatic light is hard to be obtained. With the method

the tandem PEMs are operated as electro-optic circular retardance modulators at slightly different resonant frequencies 1

2 and 3 respectively

and they generate differential signals at much lower heterodyne frequencies (0

1-2

21-23) by modulating the polarized components of the incident light. Then

the Stokes parameters S0

S1 and S2 can be obtained simultaneously by the lock-in amplifier circuit with one measurement. The basic principle is introduced

basic equations are derived

and the feasibility of the method is verified through the corresponding numerical simulation. The preliminary analysis indicates that the method not only retains the advantages of the existing PEM-based polarimetry

but also decreases the frequency of modulated photocurrent by 2-3 orders of magnitude(10-500 Hz). Moreover

its signals can be detected by a common array detector. This method has potential applications to the high precision polarization imaging technology.

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references

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