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

被引：1
作者：
Jingtao Xin
Chunqing Gao
Chen Li
Zheng Wang
机构：
[1] Beijing Institute of Technology,School of Opto
来源：
Applied Physics B | 2012年 / 108卷
关键词：
Orbital Angular Momentum; Bright Spot; Topological Charge; Quarter Wave Plate; Polarization Conversion;
D O I：
暂无
中图分类号：
学科分类号：
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 m0 passes through an mth order SVRP, it was transformed into two orthogonal circularly polarized beams with topological charge m0 + m and m0 − 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：3
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