Robust structured light in atmospheric turbulence  

作　　者：Asher Klug Cade Peters Andrew Forbes 

机构地区：[1]University of the Witwatersrand,School of Physics,Wits,South Africa

出　　处：《Advanced Photonics》2023年第1期71-82,共12页先进光子学（英文）

基　　金：the National Research Foundation and the CSIR-NRF Rental Pool Program.

摘　　要：Structured light is routinely used in free-space optical communication channels,both classical and quantum,where information is encoded in the spatial structure of the mode for increased bandwidth.Both real-world and experimentally simulated turbulence conditions have revealed that free-space structured light modes are perturbed in some manner by turbulence,resulting in both amplitude and phase distortions,and consequently,much attention has focused on whether one mode type is more robust than another,but with seemingly inconclusive and contradictory results.We present complex forms of structured light that are invariant under propagation through the atmosphere:the true eigenmodes of atmospheric turbulence.We provide a theoretical procedure for obtaining these eigenmodes and confirm their invariance both numerically and experimentally.Although we have demonstrated the approach on atmospheric turbulence,its generality allows it to be extended to other channels too,such as aberrated paths,underwater,and in optical fiber.

关 键 词：structured light TURBULENCE orbital angular momentum EIGENMODES 

分 类 号：TN929.1[电子电信—通信与信息系统]