基于磁致伸缩棒的干涉型微纳光纤磁场传感器  

Interferometric Optical Microfiber Magnetic Field Sensor Based on Magnetostrictive Rod

作　　者：贾灵艳 梁丽丽[2] 谢飞[2] 王志达 王辰 王澳 李国玉[2] 李燕[2] 刘明生 Jia Lingyan;Liang Lili;Xie Fei;Wang Zhida;Wang Chen;Wang Ao;Li Guoyu;Li Yan;Liu Mingsheng(School of Electronic and Information Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Optical Fiber Biosensing and Communication Devices,Institute of Information Technology,Handan University,Handan 056005,Hebei,China;Shijiazhuang Institute of Railway Technology,Shijiazhuang 050041,Hebei,China)

机构地区：[1]河北工业大学电子信息工程学院,天津300401 [2]邯郸学院信息技术研究所,河北省光纤生物传感与通信器件重点实验室,河北邯郸056005 [3]石家庄铁路职业技术学院,河北石家庄050041

出　　处：《激光与光电子学进展》2023年第7期354-358,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62175055);河北省自然科学基金(F2021109003);河北省光纤生物传感与通信器件重点实验室(SZX2022010);河北省教育厅高等学校科学技术研究项目(BJ2021093,QN2020533);邯郸市科学技术研究与发展计划(20312904061);邯郸学院校级项目(XZ2020303,XZ2021401,16215,XZ2021108,2017204)。

摘　　要：提出了一种干涉型微纳光纤磁场传感器,由微纳光纤干涉仪和TbDyFe超磁致伸缩棒构成,单模光纤经过熔融拉锥形成双锥型微纳光纤干涉仪,与TbDyFe超磁致伸缩棒平行固定封装,磁场作用下磁致伸缩棒和微纳光纤干涉仪发生轴向应变,引起干涉谱的波长漂移,形成波长编码型的光纤磁场传感器。实验结果表明,相同应变特性的微纳光纤干涉仪,磁致伸缩棒直径越小,磁场灵敏度越高,直径为2 mm的TbDyFe磁致伸缩棒组成的光纤磁场传感器灵敏度可以达到0.178 nm/mT,该传感器结构简单,易于制备,成本低廉,响应快,可以实现微弱磁场的高灵敏探测。An interferometric microfiber magnetic field sensor composed of a microfiber interferometer and a TbDyFe magnetostrictive rod is proposed.The microfiber interferometer was formed by tapering a single-mode fiber and placed in lateral contact with a TbDyFe magnetostrictive rod.Under the action of a magnetic field,the axial strain of the magnetostrictive rod and the microfiber interferometer causes a wavelength shift of the interference spectrum,which forms a wavelength coding fiber magnetic field sensor.The experimental results show that for the microfiber interferometers with the same strain characteristics,the smaller the diameter of the magnetostrictive rod is,the higher the magnetic field sensitivity is.The sensitivity of the fiber magnetic field sensor composed of TbDyFe magnetostrictive rod with a diameter of 2 mm can reach up to 0.178 nm/mT.The sensor has the advantages of simple structure,easy fabrication,low cost,and fast response.It can realize highly sensitive detection of weak magnetic field.

关 键 词：传感器 光纤传感 微纳光纤干涉仪 磁场传感 超磁致伸缩棒 

分 类 号：O433[机械工程—光学工程]