Secure optical interconnects using orbital angular momentum beams multiplexing/multicasting  

作　　者：Yifan Zhao Jun Liu Shuhui Li Andong Wang Long Zhu Yan Luo Shi Chen Nan Zhou Shuang Zheng Jing Du Jian Wang 

机构地区：[1]Huazhong University of Science and Technology,Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information,Wuhan,China [2]Optics Valley Laboratory,Wuhan,China [3]Shenzhen Institute of Huazhong University of Science and Technology,Shenzhen,China

出　　处：《Advanced Photonics Nexus》2024年第1期26-35,共10页先进光子学通讯（英文）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.62125503,62261160388,and 62101198);the Natural Science Foundation of Hubei Province of China (Grant Nos.2021CFB011 and 2023AFA028);the Key R&D Program of Hubei Province of China (Grant Nos.2020BAB001 and 2021BAA024);Shenzhen Science and Technology Program (Grant No.JCYJ20200109114018750);the Innovation Project of Optics Valley Laboratory (Grant Nos.OVL2021BG004 and OVL2023ZD004).

摘　　要：Orbital angular momentum(OAM),described by an azimuthal phase term expej lθT,has unbound orthogonal states with different topological charges l.Therefore,with the explosive growth of global communication capacity,especially for short-distance optical interconnects,light-carrying OAM has proved its great potential to improve transmission capacity and spectral efficiency in the space-division multiplexing system due to its orthogonality,security,and compatibility with other techniques.Meanwhile,100-m freespace optical interconnects become an alternative solution for the“last mile”problem and provide interbuilding communication.We experimentally demonstrate a 260-m secure optical interconnect using OAM multiplexing and 16-ary quadrature amplitude modulation(16-QAM)signals.We study the beam wandering,power fluctuation,channel cross talk,bit-error-rate performance,and link security.Additionally,we also investigate the link performance for 1-to-9 multicasting at the range of 260 m.Considering that the power distribution may be affected by atmospheric turbulence,we introduce an offline feedback process to make it flexibly controllable.

关 键 词：orbital angular momentum free-space optical interconnects security space-division multiplexing MULTICASTING 

分 类 号：TN9[电子电信—信息与通信工程]