基于达曼光栅的圆柱形向量光束检测  

Cylindrical Vector Beam Detection Based On Dammam Grating

作　　者：梁韶华[1] 朱剑锋[1] 薛斌[2] 

机构地区：[1]钦州学院电子与信息工程学院,广西钦州535000 [2]钦州学院机械与船舶海洋工程学院,广西钦州535000

出　　处：《信阳师范学院学报（自然科学版）》2017年第3期428-431,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(51465006);钦州市重点实验室项目(620174013)

摘　　要：圆柱形向量束(cylindrical vector beam,CVB)的极化拓扑荷阶数定义为沿着方位轴360°偏振状态改变的重复数,其符号表示极化的旋转方向.提出用达曼光栅检测具有不同拓扑荷的CVB检测方法.达曼光栅采用几乎是纯相位调制和偏振无关的q-plate加工.具有不同拓扑荷或相同拓扑荷但符号相反的CVB模式可以通过添加四分之一波片和偏振器分离.实验结果与理论预测一致,从而验证了方案的可行性.The topological charge polarization order of the cylindrical vector beam（CVB）can be defined as the repeat number of the 360° polarization state changes along the azimuth axis,and the direction of polarization rotation is indicated with the symbol.Dammam grating was proposed as the method to detect CAB with different topological charges.Q-plate processing with almost pure phase modulation and no relation with polarization was used in Dammam grating.The CVB model with different topological charges or same topological charge but with opposite signs could be separated by adding aquarter wave plate and a polarizer.The consistency between the experiment results and the theoretical prediction is obtained to illuminate the feasibility of the scheme.

关 键 词：CVB 拓扑荷 偏振无关 q-plate 

分 类 号：TN248.1[电子电信—物理电子学]