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Estimating topological charge of propagating vortex from single-shot non-imaged speckle

查看全文 作　　者：[1]陈丽;Rakesh Kumar [1,2]Singh;Aristide [3]Dogariu;[1,3]陈子阳;[1,4]蒲继雄 高影响力作者 机构地区：[1]College of Information Science and Engineering,Huaqiao University,Xiamen 361021,China;[2]Department of Physics,Indian Institute of Technology(BHU),Varanasi 221005,Uttar Pradesh,India;[3]CREOL,College of Optics and Photonics,University of Central Florida,Orlando,FL 32816-2700,USA;[4]Fujian Provincial Key Laboratory of Light Propagation and Transformation,Huaqiao University,Xiamen 361021,China高影响力机构 出　　处：《Chinese Optics Letters》索引2021年第19卷第2期,共6页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(NSFC)(No.11674111);Fujian Province Science Funds for Distinguished Young Scholar(No.2018J06017);Fundamental Research Funds for the Central Universities(No.ZQN-PY209);Science and Engineering Research Board(SERB)(No.India-EMR/2015/001613)。 摘　　要：Encoding information using the topological charge of vortex beams has been proposed for optical communications. The conservation of the topological charge on propagation and the detection of the topological charge by a receiver are significant in these applications and have been well established in free-space. However, when vortex beams enter a diffuser,the wavefront is distorted, leading to a challenge in the conservation and detection of the topological charge. Here, we present a technique to measure the value of the topological charge of a vortex beam obscured in the randomly scattered light. The results of the numerical simulations and experiments are presented and are in good agreement. In particular, only a single-shot measurement is required to detect the topological charge of vortex beams, indicating that the method is applicable to a dynamic diffuser. 关 键 词：intensity correlation vortex beam SCATTERING
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