Multiplication and division of orbital angular momentum beams by Fermat's spiral transformation

被引：4
作者：
Zeng, Zishuai [1 ]
Pang, Zihao [1 ]
Pan, Keming [1 ]
Xu, Jia [1 ]
Zhao, Daomu [1 ]
机构：
[1] Zhejiang Univ, Sch Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310058, Peoples R China
来源：
PHOTONICS RESEARCH | 2023年 / 11卷 / 02期
基金：
中国国家自然科学基金;
关键词：
FREE-SPACE; QUANTUM CRYPTOGRAPHY; OPTICAL VORTICES; LIGHT; COMMUNICATION; TRANSMISSION; GENERATION; COMPACT; STATES;
D O I：
10.1364/PRJ.477439
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Optical geometrical transformation is a novel and powerful tool to switch orbital angular momentum (OAM) states in modern optics. We demonstrate a scheme to operate multiplication and division in OAM by Fermat's spiral transformation. The characteristics of the output beams in the case of integer and fraction OAM operations are presented in detail. Additionally, the power weight of the output OAM modes and the interference patterns of the output beams are reported to confirm the expected ability of OAM mode conversion by Fermat's spiral transformation. We further investigate the evolution of OAM beams in operations theoretically and experimentally. This work provides a practical way to perform an optical transformation mapping on OAM beams. It can find application in optical communications with larger OAM mode numbers as well as quantum information in high-dimensional systems. & COPY; 2023 Chinese Laser Press
引用
收藏
页码：165 / 172
页数：8
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