中国光学（中英文）2025，Vol.18Issue(1)：198-205,8.DOI:10.37188/CO.EN-2024-0005
基于周期性微通道长周期光纤光栅的制备与传感特性研究
Preparation and sensing characteristics of long-period fiber gratings based on periodic microchannels
摘要
Abstract
Long-period fiber gratings have the advantages of small size,corrosion resistance,anti-electro-magnetic interference,and high sensitivity,making them widely used in biomedicine,the power industry,and aerospace.This paper develops a long-period fiber grating sensor based on periodic microchannels.First,a series of linear structures were etched in the cladding of a single-mode fiber by femtosecond laser microma-chining.Then,the laser-modified region was selectively eroded by selective chemical etching to obtain the periodic microchannel structure.Finally,the channels were filled with polydimethylsiloxane(PDMS)to im-prove the spectral quality.The experimental results show that the sensor has good sensitivity in the measure-ment of various parameters such as temperature,stress,refractive index(RI),and bending.It has a temperat-ure sensitivity of-55.19 pm/℃,a strain sensitivity of-3.19 pm/με,a maximum refractive index sensitivity of 540.28 nm/RIU,and a bending sensitivity of 2.65 dB/m-1.All of the measurement parameters show good lin-ear responses.The sensor has strong application prospects in the field of precision measurement and sensing.关键词
长周期光纤光栅/飞秒激光微加工/光纤传感器Key words
long-period fiber gratings/femtosecond laser micromachining/fiber sensors分类
信息技术与安全科学引用本文复制引用
孙财,李元君,杨禾儿,潘学鹏,刘善仁,王博,高萌萌,国旗,于永森..基于周期性微通道长周期光纤光栅的制备与传感特性研究[J].中国光学（中英文）,2025,18(1):198-205,8.基金项目
国家自然科学基金(No.62090064,No.62131018,No.62305130,No.62090063,No.62075082,No.U20A20210,No.61827821)Supported by National Natural Science Foundation of China(No.62090064,No.62131018,No.62305130,No.62090063,No.62075082,No.U20A20210,No.61827821) （No.62090064,No.62131018,No.62305130,No.62090063,No.62075082,No.U20A20210,No.61827821）
