增强偏振态二维无序分布特性的光学晶体退偏器  

Optical crystal depolarizer to enhance two-dimensional disorderly distribution of SOP

作　　者：陈哲[1,2] 吕锋[1] 葛菁华[1] 张军[1,2] 余健辉[1,2] 林宏奂[3] 隋展[3] 

机构地区：[1]暨南大学光电工程系,广东广州510632 [2]光电信息与传感技术广东普通高校重点实验室(暨南大学),广东广州510632 [3]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《红外与激光工程》2013年第5期1258-1264,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(61177075;11004086;61008057);中央高校基本科研业务费专项资金(21612437;21612117;21612450);广东高校优秀青年创新人才培养计划项目(LYM10024)

摘　　要：针对光楔型退偏器输出光偏振态存在的条形带状分布问题,文中通过增加晶体斜面结构和光轴方向复杂组合,设计和制作了一种具有增强偏振态二维无序分布特性的光学晶体退偏器,增强了偏振态在二维通光平面内的无序分布。仿真和实验显示,出射光在通光平面内偏振态连续条形带状分布明显减弱,有效改善了退偏光的偏振态二维分布均匀性。晶体斜面结构和光轴方向的组合越复杂,偏振态二维分布将会越无序,退偏效果也越好。In order to solve the problems of polarization zonal distribution of optical state of polarization （SOP） in the output light of wedge-shaped depolarizer, an optical crystal depolarizer with high disorderly distribution of SOP on the cross section of output light was designed and built. The optical crystal depolarizer combined many more crystal slope structures and optical axes to make the polarization change in light plane and to improve depolarizing efficiency. The simulation and experiments showed that the polarization zonal distribution of output light was weaken obviously and the uniformity of depolarization was improved on the transverse plane of light. The more intricately both crystal slope structures and optical axes were combined, the more disorderly the polarization distribution of the depolarizer would be, and the better the depolarization effect would be.

关 键 词：晶体退偏器 双折射晶体 偏振态 光轴 无序分布 

分 类 号：TN214[电子电信—物理电子学]