空气孔-沟槽辅助六芯光纤传输特性的研究  

Research on transmission characteristics of six core optical fibers assisted by air holes and grooves

作　　者：宋锡策 闫煜鹏 蒲俊宇 孙宏森 刘凯 李长江 钟宇豪 余先伦[1] SONG Xice;YAN Yupeng;PU Junyu;SUN Hongsen;LIU Kai;LI Changjiang;ZHONG Yuhao;YU Xianlun(School of Electronic and information Engineering,Chongqing Three Gorges University,Chongqing 404020,China)

机构地区：[1]重庆三峡学院电子与信息工程学院,重庆404020

出　　处：《光通信技术》2025年第2期90-94,共5页Optical Communication Technology

基　　金：国家重点研发计划(2021YFB3901405)资助;国家自然科学基金项目(U2030116)资助;重庆市重点实验室项目(YB2020C0301)资助。

摘　　要：为了提升光纤的传输性能,设计了一种空气孔-沟槽辅助六芯光纤结构。六芯光纤中每根纤芯被一层低折射率沟槽包围,纤芯与沟槽之间存在一层包层,同时光纤周围环绕着空气孔辅助结构。基于光纤的耦合模式理论,对光纤的串扰、模场面积以及弯曲损耗3种传输特性进行了深入分析。研究结果表明:带有空气孔-沟槽辅助结构的光纤在芯间串扰方面表现最佳,串扰值达到最低约-55 d B;而单沟槽辅助结构则有效增大了光纤的模场面积,达到最大值约390μm^(2)。然而,不同结构下光纤的弯曲损耗变化并未呈现明显规律,但其对数取值集中在4~9 d B/m。In order to improve the transmission performance of optical fibers,an air holes and grooves six core optical fiber structure was designed.In multi-core optical fibers,each core is surrounded by a layer of low refractive index grooves,with a cladding layer between the core and the grooves,and an air hole auxiliary structure surrounding the fiber.Based on the coupled-mode theory of optical fibers,an in-depth analysis was conducted on three transmission characteristics:crosstalk,mode field area,and bending loss.The research findings indicate that the fiber with the air holes and grooves structure exhibits the best performance in terms of inter-core crosstalk,achieving a minimum crosstalk value of approximately-55 dB.On the other hand,the single-trench-assisted structure effectively increases the mode field area of the fiber,reaching a maximum value of about 390μm^(2).However,the variation in bending loss across different structures does not show a clear pattern,with its logarithmic values concentrated in the range of 4~9 dB/m.

关 键 词：空气孔-沟槽辅助光纤 弯曲损耗 芯间串扰 有效模场面积 

分 类 号：TN929.11[电子电信—通信与信息系统]