光通信技术2025，Vol.49Issue(1)：83-87,5.DOI:10.13921/j.cnki.issn1002-5561.2025.01.014
基于时分复用的双通道锥形光纤磁场传感系统研究
Research on dual-channel tapered optical fiber magnetic field sensing system based on time division multiplexing
摘要
Abstract
To address the limitations of multiplexing capabilities in magnetic fluid optical fiber magnetic field sensors,a du-al-channel tapered optical fiber magnetic field sensing system based on time division multiplexing(TDM)is designed.This sys-tem creates two independent sensing channels by connecting magnetic field sensing units coated with magnetic fluid to two cas-caded optical fiber loops.These two sensing channels share a coherent detection phase-sensitive optical time-domain reflectome-ter(φ-OTDR),which not only serves as a pulse light source but also performs signal detection and digital demodulation func-tions.Each sensing channel integrates a magnetic field sensing unit,enabling simultaneous multi-point magnetic field measure-ments using TDM technology.The experimental results show that the two sensing channels can operate independently.They ex-hibit high sensitivity of-1.09 dB/(km·mT)and-3.466 dB/(km·mT)within the magnetic field strength ranges of3to 14 mT and 2 to 7 mT,respectively.The linear fitting accuracies reached 99.4％and 99.1％,respectively.关键词
磁场测量/光纤传感/锥形光纤/磁流体Key words
magnetic field measurement/optical fiber sensing/tapered optical fiber/magnetic fluid分类
信息技术与安全科学引用本文复制引用
梁卓伟,张红娟,高妍,靳宝全..基于时分复用的双通道锥形光纤磁场传感系统研究[J].光通信技术,2025,49(1):83-87,5.基金项目
中央引导地方科技发展资金项目(YDZJSX20231B004)资助 （YDZJSX20231B004）
山西省科技创新人才团队专项(201805D131003)资助 （201805D131003）
山西省重点研发计划项目(202202130501004)资助. （202202130501004）
