基于TFBG边缘滤波的FBG温度传感器  

FBG temperature sensor based on edge filtering of TFBG

作　　者：杨明聪 黄勇林[1] 钱宇阳 YANG Mingcong;HUANG Yonglin;QIAN Yuyang(College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,南京210023

出　　处：《光通信技术》2024年第1期29-33,共5页Optical Communication Technology

基　　金：江苏省光通信工程技术研究中心课题项目(ZXF201804)资助。

摘　　要：为了提高系统的温度灵敏度,设计了一种基于倾斜光纤光栅(TFBG)边缘滤波的光纤布喇格光栅(FBG)温度传感器。该系统在常规的TFBG边缘滤波解调系统上引入一个光纤环形镜,将从TFBG透射的光信号反射回来,使其能再次通过TFBG,以增加TFBG透射谱的深度,并对传感光栅进行封装。实验结果表明:封装前和封装后的传感光栅在所测量的温度区间内中心波长的漂移量分别为0.55 nm和7 nm,封装后的漂移量扩大了十多倍;同时,由于TFBG边缘滤波解调传递函数的斜率得到提高,传感器波长解调后的温度灵敏度也得到了改善,是未级联光纤环形镜传感器的1.6~2.4倍。In order to improve the temperature sensitivity of the system,a fiber Bragg grating(FBG)temperature sensor based on tilted fiber Bragg grating(TFBG)edge filter is designed.In this system,a fiber ring mirror is introduced into the conventional TFBG edge filter demodulation system to reflect the transmitted light signal from TFBG back,so that it can pass through TFBG again,increase the depth of TFBG transmission spectrum,and encapsulate the sensor grating.The experimental results show that the drift of the center wavelength of the sensor grating before and after packaging is 0.55 nm and 7 nm respectively,and the drift of the sensor grating after packaging is expanded by more than ten times.At the same time,because the slope of the demodulation transfer function of TFBG edge filter is improved,the temperature sensitivity of the sensor after wavelength demodulation is also improved,which is 1.6~2.4 times that of the uncascaded optical fiber ring mirror sensor.

关 键 词：光纤传感技术 倾斜光纤光栅 边缘滤波 温度传感 

分 类 号：TN212.9[电子电信—物理电子学]