Measuring orbital angular momentum of helical beams by spatially variable retardation plates

被引：5
|
作者：
Xin, Jingtao [1 ]
Gao, Chunqing [1 ]
Li, Chen [1 ]
Wang, Zheng [1 ]
机构：
[1] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 108卷 / 04期
基金：
美国国家科学基金会;
关键词：
LIGHT; STATES;
D O I：
10.1007/s00340-012-5194-3
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The transformation of Laguerre-Gaussian (LG) beams by a spatially variable retardation plate (SVRP), composed of half wave plates, is investigated. When a LG beam with topological charge of m(0) passes through an mth order SVRP, it was transformed into two orthogonal circularly polarized beams with topological charge m(0) + m and m(0) - m. This property is used to measure topological charges of LG beams. We also propose an efficient method which can be used to check mixed orbital angular momentum states.
引用
收藏
页码：703 / 706
页数：4
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