模场直径可调的光纤微准直器  

Optical fiber micro-collimator with adjustable mode field diameter

作　　者：陈书玉 杨世泰 汪杰君 苑立波 CHENG Shuyu;YANG Shitai;WANG Jiejun;YUAN Libo(School of Marine Engineering,Guilin University of Electronic Science and Technology Beihai Campus,Beihai Guangxi 536000,China;School of Optical Engineering,Guilin University of Electronic Science and Technology,Guilin Guangxi 541000,China;Postdoctoral Research Center of Mechanical Engineering,Guilin University of Electronic Science and Technology,Guilin Guangxi 541000,China)

机构地区：[1]桂林电子科技大学北海校区海洋工程学院,广西北海536000 [2]桂林电子科技大学光学工程学院,广西桂林541000 [3]桂林电子科技大学机械工程博士后流动站,广西桂林541000

出　　处：《光通信技术》2024年第4期42-46,共5页Optical Communication Technology

基　　金：国家自然基金联合基金重点项目(U23A20373)资助;桂林电子科技大学研究生教育创新计划项目(2023YCXS248)资助。

摘　　要：针对传统光纤准直器的输出模场直径单一问题,提出了一种模场直径可调的光纤微准直器,将单模光纤与不同的2段多模光纤组合,形成“三明治”结构;通过调整中间段光纤的长度,实现模场直径的任意可调,并构建了仿真实验模型,制备了多个尺寸不同的光纤微准直器样品。实验结果表明:该结构在1 550 nm波段下,能实现输出模场直径在20~40μm范围内的可调性。该光纤准直器制备方法简便、结构紧凑,并能根据需求灵活调整光场的模场直径,以适应不同的应用场景。A fiber micro collimator with adjustable mode field diameter is proposed to address the problem of single output mode field diameter in traditional fiber collimators.The single mode fiber is combined with different 2-segment multimode fibers to form a"sandwich"structure.By adjusting the length of the middle section of the optical fiber,the mode field diameter can be ad-justed arbitrarily,and a simulation experimental model has been constructed to prepare multiple fiber micro collimator samples with different sizes.The experimental results show that the structure can achieve adjustability of the output mode field diameter in the range of 20~40μm in the 1550 nm wavelength band.The preparation method of this fiber collimator is simple,compact in structure,and can flexibly adjust the mode field diameter of the light field according to the needs to adapt to different application scenarios.

关 键 词：光纤准直器 光纤器件 模场直径 

分 类 号：TN253[电子电信—物理电子学]