光通信研究Issue(2)：73-79,7.DOI:10.13756/j.gtxyj.2025.240015
新型环芯光纤及其模式选择耦合器的研究
Research on a New Type of Ring-core Fiber and Mode Selective Coupler
摘要
Abstract
[Objective]Mode-Selected Coupler(MSC)is a key component of Mode Division Multiplexing(MDM)for optical fi-ber communication system.In a MDM system,MSC can realize the transmission of different signals in different modes,thus in-creasing the transmission capacity.However,when fabricating a MSC with low insertion loss,the fabrication difficulty of the MSC is heightened due to the very close propagation constants between the modes.Therefore,there is an urgent need for a Few-Mode Fiber(FMF)with easily separable modes to serve as a key material for the fabrication of MSCs,thereby reducing the fabri-cation difficulty.[Methods]In this letter,a new type of ring-core FMF is proposed and fabricated.The FMF supports three lin-early polarized modes LP01,LP11 and LP21 in the C-band for fiber communication.Based on the theory of mode coupling,the arti-cle analyzes the impact of various parameters of the MSC on mode coupling and studies the coupling patterns between modes as in-fluenced by fiber core spacing and coupling distance.[Results]The fused biconical tapering method is used to fabricate the MSCs of LP01,LP11 and LP21.The experimental results show that the insertion losses of the MSCs of LP01,LP11 and LP21 at 1 540,1 530 and 1 550 nm are 0.10,0.17 and 0.30 dB,respectively.The mode conversion efficiencies are 97.72%,96.16%and 93.32%,respectively.The mode conversion bandwidths of LP01,LP11 and LP21 are 125,120 and 35 nm,respectively.[Conclu-sion]This research provides a new type of ring-core FMF,which can reduce the fabrication difficulty of MSCs.The low-loss MSCs have great potential application for MDM optical fiber communication system.关键词
模分复用/少模光纤/模式选择耦合器/线性偏振模式Key words
MDM/FMF/MSC/liner polarization mode分类
电子信息工程引用本文复制引用
许青向,颜苗,李茂春,张骏皓,马晓宇,陈伟..新型环芯光纤及其模式选择耦合器的研究[J].光通信研究,2025,(2):73-79,7.基金项目
国家自然科学基金面上项目(62275148,12074349) （62275148,12074349）
江苏省产业前瞻与关键核心技术资助项目(BE2022055-4) （BE2022055-4）
中国船舶航海保障技术实验室开放基金资助项目(2023010102) （2023010102）
