中国光学（中英文）2025，Vol.18Issue(2)：216-223,8.DOI:10.37188/CO.2024-0141
涡旋光轨道角动量的拓扑荷差值法测量
Measurement of orbital angular momentum of vortex beam by topological charge difference
摘要
Abstract
We present a topological charge difference detection technique for the orbital angular momentum of vortex beams.In this technique,by utilizing two vortex beams with distinct topological charges,a period-ic difference pattern is generated.The orbital angular momentum of the vortex beam to be measured can be quickly and accurately calculated by reading the number of spots in one period.Compared with traditional in-terference and diffraction methods which require the reception of the complete vortex beam,the topological charge difference method only requires the reception of a small amount of vortex beam to measure.This has significant advantages in the measurement of high-order and large-scale vortex beams,and has potential ap-plications in long-distance free-space optical communication of vortex beams.关键词
涡旋光/轨道角动量/拓扑荷差值/自由空间光通信Key words
vortex beam/orbital angular momentum/topological charge difference/free-space optical com-munication分类
物理学引用本文复制引用
王华鑫,王彤,熊晗..涡旋光轨道角动量的拓扑荷差值法测量[J].中国光学（中英文）,2025,18(2):216-223,8.基金项目
"十四五"江苏省重点学科资助项目(No.2021135) Supported by Fourteenth Five-Year Key Disciplines Funding Project of Jiangsu Province(No.2021135) （No.2021135）
