Settled fast measurement of topological charge by direct extraction of plane wave from vortex beam

作     者：Xiao-Bo Yang Jin Hu 杨晓波;胡进

作者机构：School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China Institute of Information EngineeringChinese Academy of SciencesBeijing 100195China China Beijing Key Laboratory of Fractional Signals and SystemsBeijing 100081China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第10期

页      面：306-317页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61975015,61575022,and 61421001) the Beijing Natural Science Foundation,China(Grant No.L191004) 

主　　题：vortex beam topological charge settled measurement 

摘      要：A method of measuring the vortex beam topological charge(TC)is proposed based on a device that can directly extract the plane wave form from the vortex beam in which the different propagation angles of the plane waves are uniquely related to the different *** the TC can be obtained by simply comparing the energy values perceived by two fixed sensors in the detection location with the help of twin omnidirectional energy absorbers(OEAs).Because the settled detection relies only on the simple quantitative value at two fixed positions,neither pattern recognition nor field analysis procedure is applied,thus allowing faster *** features of the methodology are investigated,and the numerical simulations verify the feasibility and robustness of the system.