基于可调谐扫描激光器的高精度波长解调技术研究  

Research on High-precision Wavelength Demodulation Technology Based on Tunable Scanning Laser

作　　者：马海龙 刘毅 郝慧艳[1] 李旭东 赵虎威 赵辉[1] MA Hailong;LIU Yi;HAO Huiyan;LI Xudong;ZHAO Huwei;ZHAO Hui(School of Information and Communication Engineering,North University of China,Taiyuan 030051,CHN;Shandong Institute of Metrology,Jinan 250014,CHN)

机构地区：[1]中北大学信息与通信工程学院,太原030051 [2]山东省计量科学研究院,济南250014

出　　处：《光电子技术》2025年第1期64-70,共7页Optoelectronic Technology

基　　金：山西省回国留学人员科研资助项目(2022-146)。

摘　　要：针对传统温度传感器在复杂电磁环境中精度受限导致误报以及故障定位不准的问题,在采用光纤光栅(FBG)传感技术实现对设备电缆接头温度的测量时,利用可调谐扫描激光器且辅以标准具(FPE)作为参考光路,并融合高斯滤波(Gaussian Filtering)与高斯最小二乘拟合的解调方法,快速准确地识别FBG反射光谱的中心波长,实现对温度参数的高精度实时监测。在特定温度环境下进行实验,对多组FBG中心波长数据分析处理,得到FBG中心波长‑温度回归直线模型。实验结果表明,系统的温度解调动态范围覆盖30℃~70℃,解调精度≯0.5℃,能够实现对设备温度准确快速地测量。In response to the problem of false alarms and inaccurate fault location caused by the limited accuracy of traditional temperature sensors in complex electromagnetic environments,a fiber Bragg grating(FBG)sensing technology was used to measure the temperature of equipment cable joints.A tunable scanning laser was used,and supplemented by a standard tool(FPE)as a reference,and a demodulation method combining Gaussian filtering and Gaussian least squares fitting was integrated to quickly and accurately identify the center wavelength of FBG reflection spectrum,achieving high-precision real-time monitoring of temperature parameters.Experiments were conducted under specific temperature conditions,multiple sets of FBG center wavelength data were analyzed and processed,and a FBG center wavelength temperature regression line model was obtained.The experimental results showed that the temperature demodulation dynamic range of the system could cover 30℃~70℃with an accuracy of≯0.5℃,which could achieve accurate and fast measurement of equipment temperature.

关 键 词：光纤光栅 高斯最小二乘拟合 波峰检测 

分 类 号：TN253[电子电信—物理电子学]