随机波动与遮挡下涡旋光束的轨道角动量实时测量  

Real-time measurement of orbital angular momentum of vortex beams under random fluctuations and obstruction

作　　者：陈险峰 CHEN XianFeng(School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学物理与天文学院,上海200240

出　　处：《中国科学：物理学、力学、天文学》2024年第10期170-172,共3页Scientia Sinica Physica,Mechanica & Astronomica

摘　　要：涡旋光束携带轨道角动量,在增加光通信信息容量方面具有重要的应用价值.在自由空间光通信应用中,对涡旋光束的轨道角动量进行精确测量是一个关键的问题.最近的一项研究结合相移定理与自参考全息技术,提出了一种用于随机波动和遮挡的涡旋光束的轨道角动量实时测量方法.根据初始轨道角动量与观测平面上相干奇点之间的定量关系,可以同时确定初始轨道角动量的符号和大小.Vortex beams carry orbital angular momentum and are of great application value for increasing the information capacity of optical communication.Accurate measurement of the orbital angular momentum of a vortex beam is a critical issue in free-space optical communication applications.A recent study combined the phase shift theorem with self-reference holography to propose real-time measurements of the orbital angular momentum for randomly fluctuating and obstructed vortex beams.According to the quantitative relationship between the initial orbital angular momentum and the coherent singularity in the observation plane,the sign and magnitude of the initial orbital angular momentum can be determined simultaneously.

关 键 词：光学涡旋 相位恢复 轨道角动量测量 抗湍流和抗扰动 

分 类 号：O43[机械工程—光学工程]