中国光学（中英文）2024，Vol.17Issue(3)：674-682,9.DOI:10.37188/CO.EN-2023-0015
基于光纤U形腔的马赫-曾德尔干涉仪的磁场传感器
Magnetic field sensor utilizing U-Shaped Cavity based on in-fiber Mach-Zehnder interferometer
摘要
Abstract
An optical fiber magnetic field sensor is proposed and experimentally demonstrated by using a U-shaped cavity based on in-fiber Mach-Zehnder interferometer(MZI)coated with magnetic fluid(MF).The magnetic field sensor is manufactured by splicing a section of single-mode fiber(SMF)between two sec-tions of SMF with designed fiber geometric relationships.As the geometric symmetry MZI is strongly sensit-ive to the surrounding refractive index(RI)with a high sensitivity up to-13588 nm/RIU and MF's RI is sensitive to magnetic field,the magnetic field sensing function of the proposed structure is realized.The res-ults show that the magnetic field sensitivity reaches as high as 137 pm/Oe,and the magnetic field range is al-most linear from 0 to 250 Oe.The proposed magnetic field sensor has the advantages of small size,low cost,easy to manufacture,robustness,high sensitivity,good repeatability and easy to integrate with fiber optic sys-tems.关键词
磁场传感器/磁流体/U型腔体/光纤传感器Key words
magnetic field sensor/magnetic fluid/U-shaped cavity/optical sensor分类
信息技术与安全科学引用本文复制引用
范鹏程,蒋学寨,田德强,张光强..基于光纤U形腔的马赫-曾德尔干涉仪的磁场传感器[J].中国光学（中英文）,2024,17(3):674-682,9.基金项目
中车株洲电力机车研究所有限公司资助Supported by the Crrc Zhuzhou Institute Co.,Ltd. （）
