考虑静态双折射和圆二色性的弹光调制器偏振特性

为了进一步理解弹光调制器(PEM)的静态双折射和圆二色性，深入研究了PEM 偏振特性。运用Muller矩阵分别描述弹光调制、静态双折射和圆二色性的偏振特性，建立了同时考虑静态双折射和圆二色性的PEM 偏振特性模型；对该模型进行理论分析和仿真分析；搭建实验装置并进行了偏振调制实验。实验结果表明理论分析正确合理，PEM 的偏振特性应为微小静态双折射、弹光调制和微弱圆二色性效应的组合。此外，还精细测量了其中一个PEM样品的圆二色性值为2.755 × 10^-2 ，静态双折射的相位延迟值b = 5.73 × 10^-2 rad 和方向角α = 3.96° 。较全面地给出了PEM 偏振特性的一般Muller矩阵描述，扩充了弹光偏振调制方面的知识。

Abstract

In order to understand the static birefringence and the circular dichroism of a photo-elastic modulator (PEM), an intensive study about the polarization characteristics of PEM is done. First of all, Muller matrices are used to describe the polarization characteristics of the photo-elastic modulation, the static birefringence and the circular dichroism. The general polarization modulation model of PEM is built. Then, the principle of the modulation model is studied, theory and simulation are analyzed. Finally, experimental apparatus is established and the polarization modulation experiment is carried out. The results show that the theory model built is reasonable and correct, the polarization modulation characteristic of PEM should be the combination of the small static birefringence,the photo-elastic modulation and the circular dichroism. Moreover, preliminary measurement for one example of PEMs shows that the circular dichroism is 2.755 × 10^-2 , the phase retardation of static birefrigence is b = 5.73 × 10^-2 rad and its direction angle is α = 3.96° . This study gives the general Mueller matrix form of a photo-elastic modulator, and expands the knowledge of the photo-elastic polarization modulation.

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李克武, 王黎明, 王志斌, 张瑞, 李晓, 张敏娟. 考虑静态双折射和圆二色性的弹光调制器偏振特性[J]. 光学学报, 2016, 36(3): 0326001. Li Kewu, Wang Liming, Wang Zhibin, Zhang Rui, Li Xiao, Zhang Minjuan. Polarization Characteristic of a Photo-Elastic Modulator with Static Birefringence and Circular Dichroism[J]. Acta Optica Sinica, 2016, 36(3): 0326001.

考虑静态双折射和圆二色性的弹光调制器偏振特性

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