应用光学, 2014, 35 (2): 307, 网络出版: 2014-04-09  

Lyot型单色光退偏器设计与研究

Design and study of Lyot monochromatic light depolarizer
作者单位
1 菏泽学院 物理系, 山东 菏泽 274015
2 曲阜师范大学 激光研究所, 山东 曲阜 273165
摘要
为了实现单色线偏振光的退偏, 在Lyot型退偏器的基础上, 设计了一种新型退偏器。该器件由2个慢轴夹角为45°的1/4波片组成, 通过对透射光的叠加分析, 发现该退偏器可将任意振动方位角的线偏振光转化为强度稳定的圆偏振光, 并得到其退偏度表达式。针对633 nm波段, 精选2个1/4波片制作样品, 并测试其退偏度。测试结果表明: 对不同方位角的线偏振光, 退偏器退偏度超过94%, 当微调入射角时, 退偏度则达到97%以上。
Abstract
Based on the Lyot depolarizer, a new type of depolarizer for monochromatic light was designed. This depolarizer consisted of two quarter-wave plates with slow-axis angle of 45°. By analyzing the superimposition of transmitted light, it was found that the incident linearly polarized light of arbitrary azimuth angle of vibration could be converted to circularly polarized light with stable intensity, and the formula of depolarization degree was derived. For the waveband of 633 nm, two quarter-wave plates were selected purposely to make the sample whose depolarization degree was tested. Experiment results indicate that the depolarization degree was over 94% and it is over 97% as the incident angle is adjusted slightly.

任树锋, 吴福全. Lyot型单色光退偏器设计与研究[J]. 应用光学, 2014, 35(2): 307. REN Shu-feng, WU Fu-quan. Design and study of Lyot monochromatic light depolarizer[J]. Journal of Applied Optics, 2014, 35(2): 307.

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