环形纤芯结构光纤设计与制备技术研究  

Research on Design and Fabrication Technology of Annular Core Structure Fiber

作　　者：伍淑坚[1] 杜城 罗文勇[1] 李尚远[3] 李伟 柯一礼 何晴 戚卫[1] WU Shu-jian;DU Cheng;LUO Wen-yong;LI Shang-yuan;LI Wei;KE Yi-li;HE Qing;QI Wei(FiberHome Telecommunication Technologies Co.,Ltd.,Wuhan 430074,China;Ruiguang Telecommunication Technologies Co.,Ltd.,Wuhan 430074,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]烽火通信科技股份有限公司,武汉430074 [2]锐光信通科技有限公司,武汉430074 [3]清华大学电气工程系,北京100084

出　　处：《光通信研究》2020年第4期31-36,67,共7页Study on Optical Communications

基　　金：国家重点研发计划资助项目(2018YFB1801800)。

摘　　要：为支持光子轨道角动量(OAM)模式大容量通信传输,文章探讨了新型OAM信号传输光纤的设计与制备技术,满足大幅度提高通信系统频谱效率和容量对特殊光纤的需求。文章模拟和评估了OAM模式在不同波导结构光纤中的模式特性和传播效果,研究结果表明,提高芯-包层折射率差有利于高阶OAM模式传输,降低了光纤内部的各种微扰。采用等离子体化学气相沉积工艺,高精度实现了设计的折射率剖面,并成功拉制了高质量的OAM光纤,其支持50 km传输28个有效OAM通道的渐变折射率;开发出了可支持96个有效OAM通道的三环芯层结构传输光纤。同时,针对新型传输需求,通过对精确制备技术进行模拟,研究开发出了保偏型OAM传输光纤和OAM掺铒光纤等支持更多OAM模式稳定传输的新型光纤。In order to support the large-capacity communication transmission based on Orbital Angular Momentum(OAM), this paper discusses the design and fabrication of new OAM signal transmission fibers to meet the needs of special optical fibers which can greatly improve the spectral efficiency and capacity of communication systems. This paper simulates and evaluates the mode characteristics and propagation effects of OAM modes in optical fibers with different waveguide structures. The implementation includes a gradient-index single-ring core OAM fiber supporting 28 effective OAM channels for 50 km transmission, and a three-ring core-structure OAM transmission fiber supporting 96 active OAM channels. Moreover, the optical fiber fabrication technology that supports more stable OAM modes transmission, such as polarization-maintaining OAM transmission fiber, is explored through numerical simulation and experimental demonstration.

关 键 词：轨道角动量 渐变环形光纤 三环形光纤 保偏型轨道角动量光纤 

分 类 号：TN818[电子电信—信息与通信工程]