【摘 要】
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Encoding information using the topological charge of vortex beams has been proposed for optical communications.The conservation of the topological charge on pro
【机 构】
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College of Information Science and Engineering,Huaqiao University,Xiamen 361021,China;College of Inf
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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 sig-nificant 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.
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