一种径向偏振光的产生方法  

A method for generating radially polarized beams

作　　者：王莫 陈培锋[1] 王英[1] 龚磊 李航 蔡雯 WANG Mo;CHEN Peifeng;WANG Ying;GONG Lei;LI Hang;CAI Wen(School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学光学与电子信息学院,武汉430074

出　　处：《激光技术》2020年第5期553-556,共4页Laser Technology

摘　　要：为了产生径向偏振光,采用组合半波片和组合线偏振片在腔外对线偏振光做极化整形的方法,进行了理论分析和实验验证。为检测该径向偏振光产生系统的性能,采用旋转检偏器法对输出光束的偏振分布进行了检测,并用经典斯托克斯参量测量法计算了偏振纯度,最后基于马赫-曾德尔干涉的原理,检测了径向偏振光对称区域的线偏振相位关系。结果表明,当组合线偏振片为4个分块时,获得了偏振纯度为80.5%的径向偏振光,并检测出光斑对称区域的线偏振相位差为π。这一结果对在低成本条件下产生高纯度的径向偏振光是有帮助的。In order to generate radially polarized beams,a method of polarization shaping of linearly polarized beams outside the cavity by a combined half-wave-plates and a combined linear polarizer was put forward.In order to detect the performance of the generating system,the polarization distribution of the output beam was detected by the rotary polarizer method,and its polarization purity was calculated by the classical stokes parameters measurement method.Finally,based on the Mach-Zehnder interference principle,the linear polarization phase relationship of the symmetric region of the radially polarized beams was detected.The results show that when the combined linearly polarizer is divided into four segments,the radially polarized beams with a polarization purity of 80.5%is obtained,and the linear polarization phase difference of the symmetric region isπ.The result is helpful to produce the radially polarized light with high purity at low cost.

关 键 词：光学设计 径向偏振光 组合线偏振片 斯托克斯参量法 马赫-曾德尔干涉 

分 类 号：O436.3[机械工程—光学工程] TN241[理学—光学]