一种新型空间伪退偏器的设计与研究  

Design and study of a novel spatial pseudodepolarizer

作　　者：王磊[1] 

机构地区：[1]菏泽学院物理系,山东菏泽274015

出　　处：《光学技术》2014年第3期209-213,共5页Optical Technique

基　　金：山东省高等学校科技计划资助项目(J11LA52);菏泽学院科学研究基金(XY13KJ04)资助课题

摘　　要：为实现单色线偏振光的退偏,设计了一种双折射晶体材料四元结构空间伪退偏器。为了分析简便,采用光波叠加的思想,分析得到退偏器正反向应用时退偏度表达式,揭示了它们的不同特性:正向应用时,退偏度随入射线偏振光方位角及入射角具有周期变化,而在某些特定的入射角情况下,可使退偏度达到理想值且没有偏振相关性。反向应用时,退偏度理论值为100%,且不随方位角和入射角变化。制作了石英晶体的样品进行实验测试,结果充分验证了理论分析的正确性。对405nm激光光源,正向在yoz面内以3.7°入射时,退偏度超过99.25%;反向应用时,退偏度均在99.21%以上,与理论分析相符。A novel quadruple birefringent depolarizer is designed for the depolarization of monochromatic linearly polarized light. Using the idea of superposition of beams for simplification, the expressions of degree of depolarization（D） for for- ward and reverse application is derived. It can be shown by the expressions that the D of forward application changes peri- odically with the vibration azimuth angle （VAA） of incident linearly polarized light and incident angle. However, it is in- dependence of the VAA as the incident angle takes some certain values. The D of reverse application is 100% which is in- dependent of the VAA and the incident angle. Sample of quartz is made to validate the theory richly. Using 405nm diode laser, the D of forward application as the incident angle is 3.7°is over 99. 25 %. And that of reverse application is over 99. 21%, which is coincided with the theory.

关 键 词：空间伪退偏器 光波叠加 退偏度 

分 类 号：O436.3[机械工程—光学工程]