基于磁流体磁体积效应的磁场与温度双参量传感器  

Magnetic field and temperature dual-parameter sensor based on magneto-volume effect of magnetic fluid

作　　者：和亮[1] 魏西媛[1] 廖娜[1] 马丽娟[1] 闫红来[1] 王伟[2] HE Liang;WEI Xiyuan;LIAO Na;MA Lijuan;YAN Honglai;WANG Wei(Engineering College,Xi'an International University,Xi'an,Shannxi 710077,China;School of Optoelectronic Engineering,Xi'an Technological University,Xi'an,Shannxi 710021,China)

机构地区：[1]西安外事学院工学院,陕西西安710077 [2]西安工业大学光电工程学院,陕西西安710021

出　　处：《光电子．激光》2023年第7期698-703,共6页Journal of Optoelectronics·Laser

基　　金：陕西省重点研发计划项目(2023-YBGY-197);陕西省教育厅重点研究计划项目(22JY026)资助项目。

摘　　要：为了实现磁场与温度的同时测量,提出并制作了一种基于磁流体(magnetic fluid,MF)磁体积效应的法布里-珀罗(Fabry-Perot,FP)腔与光纤布拉格光栅(fiber Bragg grating,FBG)级联的复合传感结构。注入空芯光纤(hollow-core fiber,HF)的MF液面与单模光纤端面形成的FP腔同时对磁场和温度敏感,与之级联的FBG只对温度敏感。通过同时监测FP腔特征峰与FBG布拉格反射峰的波长漂移,利用传感器磁场与温度敏感系数矩阵,同时获取温度与磁场信息。实验成功制备了初始腔长为56.1μm的FBG-FP温度磁场双参量传感器,磁场与温度灵敏度分别达到了16.21 pm/Oe和9.96 pm/℃,具有体积微小、结构简单、成本低等特点。该传感器可解决常规光纤磁场传感器的磁场-温度交叉敏感问题。In order to realize simultaneous measurement of magnetic field and temperature,a composite sensing structure based on the magnetic-volume effect of magnetic fluid(MF),a Fabry-Perot(FP)cavity and fiber Bragg grating(FBG)cascaded structure is proposed and fabricated.The FP cavity formed by the liquid interface of the MF injected into the hollow-core fiber(HF)and the end face of the single-mode fiber are both sensitive to magnetic field and temperature,and the cascaded FBG is only sensitive to temperature.By simultaneously monitoring the wavelength drift of FP cavity characteristic peak and FBG Bragg reflection peak,the magnetic field and temperature sensitivity coefficient matrix is used to obtain the temperature and magnetic field information simultaneously.An FBG-FP temperature and magnetic field dual parameter sensor with an initial cavity length of 56.1μm is successfully fabricated,of which the magnetic field and temperature sensitivity of are 16.21 pm/Oe and 9.96 pm/℃,respectively.The sensor has the characteristics of small volume,simple structure and low cost,which can be applied to solve the magnetic field strength and temperature cross-sensitivity problem of conventiaonl fiber-optic magnetic field sensors.

关 键 词：空芯光纤(HF) 磁流体(MF) 法布里-珀罗(FP)腔 光纤布拉格光栅(FBG) 

分 类 号：TN253[电子电信—物理电子学]