少模光纤长周期光栅--从模式转换到高灵敏度光纤传感  

Few-Mode Fiber Long-Period Gratings—From Mode Conversion to High Sensitivity Fiber-Optic Sensing

作　　者：赵云鹤 刘云启[2] ZHAO Yunhe;LIU Yunqi(Institute of Logistics Science and Engineering,Shanghai Maritime University,Shanghai 201306,China;Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海海事大学物流科学与工程研究院,上海201306 [2]上海大学特种光纤与光接入网省部共建重点实验室,上海200444

出　　处：《应用科学学报》2020年第2期310-338,共29页Journal of Applied Sciences

基　　金：国家自然科学基金(No.61875117);上海市科委重点实验室项目(No.SKLSFO2018-04)资助。

摘　　要：少模光纤长周期光栅具有波长选择性好、插入损耗低、结构灵活多变、集成度高、与光纤系统兼容等优点,是实现少模光纤中模式转换、涡旋模式调控的有效手段,在光纤通信和光纤传感领域都展现了巨大的应用价值.该文介绍了少模光纤长周期光栅在模式转换和光纤传感方面的研究进展,首先介绍了少模光纤长周期光栅的制备技术、模式耦合原理,重点介绍了少模光纤长周期光栅模式转换器,包括标准长周期光栅和螺旋长周期光栅,最后详述了基于少模光纤长周期光栅的光纤传感器的工作原理和实现方法.Few-mode fiber(FMF)long-period grating(LPG)with advantages of good wavelength selectivity,low insertion loss,flexible structure,high integration and compatibility with optical fiber systems,is an effective means to realize mode conversion and vortex mode regulation in the FMF,which have great potential for applications in the optical fiber communications and fiber-optic sensing.This paper presents the research progress of FMF-LPG in mode conversion and optical fiber sensing.Firstly,the mode coupling principle and fabrication methods of FMF-LPG are introduced.Then,the mode converters based on FMF-LPG including standard LPG and helical LPG are investigated.Finally,the working principle and implementation method of fiber-optic sensors based on FMF-LPG are demonstrated.

关 键 词：少模光纤 长周期光栅 模式转换 光纤传感 

分 类 号：P751.1[交通运输工程—港口、海岸及近海工程]