Propagation characteristics of orbital angular momentum modes at 810 nm in step-index few-mode fibers  

作　　者：Zhouxiang Wang Yuchen Xie Shuangyin Huang Han Zhou Rui Liu Zhifeng Liu Min Wang Wenrong Qi Qianqian Tian Lingjun Kong Chenghou Tu Yongnan Li Huitian Wang 王周祥;谢语晨;黄双印;周寒;刘瑞;刘志峰;王敏;齐文荣;田倩倩;孔令军;涂成厚;李勇男;王慧田(School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics,Nankai University,Tianjin 300071,China;National Laboratory of Solid State Microstructures,School of Physics,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics,Nankai University,Tianjin 300071,China [2]National Laboratory of Solid State Microstructures,School of Physics,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Optics Letters》2019年第12期1-5,共5页中国光学快报（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2017YFA0303800 and2017YFA0303700);the National Natural Science Foundation of China(Nos.11534006,11774183,and11674184);the Natural Science Foundation of Tianjin(No.16JCZDJC31300);the 111 Project(No.B07013)

摘　　要：In free-space or in optical fibers,orbital angular momentum(OAM)multiplexing for information transmission has been greatly developed.The light sources used were well coherent communication bands,and the fibers used were customized.Here,we use an 810 nm femtosecond laser to generate optical vortices carrying OAM and then feed them into two kinds of commercial step-index few-mode fibers to explore the transmission characteristics of OAM modes.We also propose a method without multiple-input multiple-output digital signal processing to identify the input OAMs.It is of great guiding significance for high-dimensional quantum information experiments via the OAMs as a degree of freedom,using the light generated by the spontaneous parametric down-conversion as the source and the commercial fibers for information transmission.In free-space or in optical fibers, orbital angular momentum(OAM) multiplexing for information transmission has been greatly developed. The light sources used were well coherent communication bands, and the fibers used were customized. Here, we use an 810 nm femtosecond laser to generate optical vortices carrying OAM and then feed them into two kinds of commercial step-index few-mode fibers to explore the transmission characteristics of OAM modes. We also propose a method without multiple-input multiple-output digital signal processing to identify the input OAMs. It is of great guiding significance for high-dimensional quantum information experiments via the OAMs as a degree of freedom, using the light generated by the spontaneous parametric down-conversion as the source and the commercial fibers for information transmission.

关 键 词：fibers MOMENTUM CHARACTERISTICS 

分 类 号：TN929.11[电子电信—通信与信息系统]