Integrated coherent beam combining system for orbital-angular-momentum shift-keying-based free-space optical links  

作　　者：Bowang Shu Yuqiu Zhang Hongxiang Chang Shiqing Tang Jinyong Leng Pu Zhou 

机构地区：[1]National University of Defense Technology,College of Advanced Interdisciplinary Studies,Changsha,China [2]National University of Defense Technology,Nanhu Laser Laboratory,Changsha,China [3]National University of Defense Technology,Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha,China

出　　处：《Advanced Photonics Nexus》2024年第3期21-31,共11页先进光子学通讯（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.62305388);the Postgraduate Scientific Research Innovation Project of Hunan Province(Grant No.QL20230007).

摘　　要：Orbital-angular-momentum(OAM)multiplexing technology offers a significant dimension to enlarge communication capacity in free-space optical links.The coherent beam combining(CBC)system can simultaneously realize OAM multiplexing and achieve high-power laser output,providing substantial advantages for long-distance communication.Herein,we present an integrated CBC system for freespace optical links based on OAM multiplexing and demultiplexing technologies for the first time,to the best of our knowledge.A method to achieve flexible OAM multiplexing and efficient demultiplexing based on the CBC system is proposed and demonstrated both theoretically and experimentally.The experimental results exhibit a low bit error rate of 0.47%and a high recognition precision of 98.58%throughout the entire data transmission process.By employing such an ingenious strategy,this work holds promising prospects for enriching ultra-long-distance structured light communication in the future.

关 键 词：orbital angular momentum coherent beam combining free-space optical communication bit error rate. 

分 类 号：TN9[电子电信—信息与通信工程]