多芯掺铒光纤的制备及其放大性能  

Fabrication and Amplification Characteristics of Multicore Erbium-Doped Fiber

作　　者：辜之木 褚应波 李海清 彭景刚 戴能利 李进延 Gu Zhimu;Chu Yingbo;Li Haiqing;Peng Jinggang;Dai Nengli;Li Jinyan(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,湖北武汉430074

出　　处：《中国激光》2022年第9期113-120,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金青年科学基金(61805093)。

摘　　要：空分复用技术被认为是未来实现光纤通信容量升级扩容的关键技术。传输距离是决定空分复用系统应用场景的关键,空分复用系统中信号的传输离不开放大器对损耗的补偿,因此,基于多芯掺铒光纤的空分复用光放大器是空分复用技术走向实用化的核心器件。本文基于改进的化学气相沉积技术结合打孔法制备了七芯掺铒光纤,并搭建了纤芯独立泵浦多芯光纤的放大系统,测试了七芯掺铒光纤的放大性能。在输入信号为0dBm,泵浦光功率为350mW的条件下,测得七芯掺铒光纤纤芯在C波段(1526~1566nm)的平均增益为14dB,平均噪声指数小于6dB,不同纤芯间的增益差小于5dB。Objective With the development of the global mobile internet,short video,internet of things,cloud computing,and 5G technology,there is a rising interest and growth in data communication.The transmission capacity of optical transmission networks in different areas such as in division multiplexing,polarisation mode multiplexing,timedivision multiplexing,and multi-level modulation has now reached 100 TB/s via wavelength technology.However,there are still challenges in the transmission capacity of the existing single-mode optical fibre communication system due to the nonlinear effect in the fibre.Multicore fibre space division multiplexing technology is one of the pivotal technologies required to realise exponential growth in fibre transmission capacity.As early as 1979,the concept of multicore fibre was introduced.However,due to the popularisation of erbium-doped fibre amplifier and dense wavelength division multiplexing,the space division multiplexing technology did not receive much attention.Space division multiplexing technology expands the data-carrying capacity of the optical communication system using space.If the existing commercial single-mode fibre is compared to a single-layer road,then the space division multiplexing based on multicore fibre would be equivalent to laying a multilayer viaduct at a time.In this case,space channels increase several times,meeting the data transmission capacity demand for high-speed growth.Methods The seven-core erbium-doped fibre was prepared by the drilling method.Firstly,seven identical erbium-doped preforms were prepared based on the modified chemical vapor deposition(MCVD)process and liquid phase doping technology,and then draw and polish them.Secondly,the high purity wove quartz fibre sock was drilled according to designed parameters.This step can accurately control the core arrangement to ensure uniform core spacing of the multicore fiber(MCF)in the drawing process.In the final step,seven prefabricated erbium-doped rods were inserted into the seven-hole casing and place

关 键 词：光纤光学 掺铒光纤 空分复用 多芯光纤 宽带放大 

分 类 号：U285.16[交通运输工程—交通信息工程及控制]