散射涡旋光轨道角动量的智能识别  

Intelligent orbital angular momentum recognition of a scattered vortex beam

作　　者：司徒国海[1,2] SITU GuoHai(Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China)

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]中国科学院大学杭州高等研究院,杭州310024

出　　处：《中国科学：物理学、力学、天文学》2022年第6期154-156,共3页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:61991452,62061136005);中国科学院前沿科学重点研究计划项目(编号:QYZDB-SSW-JSC002)资助。

摘　　要：众所周知,相干光的散射产生散斑.相干的涡旋光经过一段多模光纤传输后,同样会产生散斑.而散斑场本身携带大量相位奇点.如何从散斑中识别出入射的涡旋光所携带的轨道角动量,无论对涡旋光的研究本身还是基于涡旋光的光通信应用而言,都具有重要的意义.研究表明,深度学习是解决这一问题的有效方法.It is well known that scattering of coherent light produces speckle.So does a coherent vortex beam when it propagates through a segment of a multi-mode fiber.While the speckle field contains a number of phase singularities,the problem of recognition of the orbital angular momentum of the incident vortex beam from the output speckle becomes significantly important for both the study of vortex beams and mode division multiplexing.Deep learning is demonstrated to be an efficient approach to address this problem.

关 键 词：轨道角动量 激光散斑 正交偏振 光纤通信 深度学习 

分 类 号：TN929.1[电子电信—通信与信息系统]