具有温度补偿的拱形增敏微纳光纤磁场传感器  

Arched sensitized microfiber magnetic field sensor with temperature compensation

作　　者：王希鑫 赵勇[1,2] 吕日清 郑洪坤[1] 周怡凡 Wang Xixin;Zhao Yong;Lyu Riqing;Zheng Hongkun;Zhou Yifan(College of Information Science and Engineering,Norheastern Unirersity,Shenyang 10000,China;Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology,Qinhuangdao 066004,China)

机构地区：[1]东北大学信息科学与工程学院,沈阳110000 [2]河北省微纳精密光学传感与检测技术重点实验室,秦皇岛066004

出　　处：《仪器仪表学报》2022年第4期199-205,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61933004);河北省自然科学基金(F2020501040)项目资助。

摘　　要：提出了一种基于铽镝铁(TbDyFe)的具有温度补偿的拱形增敏微纳光纤磁场传感器。传感器由光纤布拉格光栅(FBG),拱形微纳光纤和TbDyFe组成,拱形微纳光纤通过紫外胶(UV glue)粘接在TbDyFe上。与非拱形微纳光纤相比,拱形光纤可将TbDyFe的伸长转化为光纤曲率半径的变化,引起干涉波长偏移,从而实现磁场灵敏度的提高。随着磁场强度升高,拱形微纳光纤的干涉波长蓝移,灵敏度为47.81 pm/mT,FBG对磁场不敏感,拱形微纳光纤传感器的磁场灵敏度比非拱形高11.66倍。升温过程中拱形微纳光纤的干涉波长发生蓝移,温度灵敏度为43.02 pm/℃,FBG的干涉波长发生红移,温度灵敏度为9.34 pm/℃。磁场传感器显示出良好的重复性和线性,级联的FBG对磁场不敏感,可以实现对磁场传感器的温度补偿。An arched sensitized microfiber magnetic field sensor with temperature compensation based on TbDyFe is proposed. The magnetic field sensor is consisted of FBG, an arched microfiber, and a TbDyFe. Microfiber is bonded to the TbDyFe by UV glue. Compared with the non-arched microfiber, the arched microfiber can convert the elongation of TbDyFe into the change of curvature radius of microfiber, resulting in the shift of interference wavelength, thereby realizing the improvement of the sensitivity. The interference wavelength of microfiber shows a blue shift with the increase of magnetic field intensity. The magnetic field sensitivity is 47.81 pm/mT and FBG is not sensitive to the magnetic field. The magnetic field sensitivity of arched microfiber is 11.66 times higher than that of the non-arched microfiber. During the heating process, the interference wavelength of arched microfiber is blue-shifted and the temperature sensitivity is 43.02 pm/℃. The interference wavelength of FBG is red shifted and the temperature sensitivity is 9.34 pm/℃. The magnetic field sensor shows good repeatability and linearity with the increase of the magnetic field. The cascaded FBG is not sensitive to the magnetic field and can realize temperature compensation for the sensor.

关 键 词：拱形 微纳光纤 磁场 温度补偿 铽镝铁 

分 类 号：TH73[机械工程—仪器科学与技术]