Magnetic Sensor Based on Terfenol-D Materials and Fiber Bragg Grating Fabry-Perot Cavity

被引：6
|
作者：
Ma Rui [1 ,2 ]
Zhang Wen-tao [1 ,2 ]
Wang Zhao-gang [1 ,2 ]
Huang Wen-zhu [1 ,2 ]
Li Fang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Transducer Technol, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100019, Peoples R China
来源：
ACTA PHOTONICA SINICA | 2018年 / 47卷 / 03期
关键词：
Fiber optic sensors; Fiber Bragg grating; Fiber Bragg grating Fabry-Perot cavity; Magnetostrictive material; Magnetic field; Temperature;
D O I：
10.3788/gzxb20184703.0306006
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A fiber optic magnetic sensor for the measurement of weak static magnetic field, based on Terfenol-D materials and Fiber Bragg Grating Fabry-Perot (FBG-FP) cavity, is proposed and demonstrated. In order to improve the sensitivity of the sensor, a NdFeB magnet is used to apply bias magnetic field. To compensate the environmental temperature, another FBG-FP coupled with Monet-400 is used as a reference. The measurement sensitivity of the sensor is 1.7 X 10(-3) pm/mu T, which results in a magnetic induction resolution of 3.0 mu T. The experimental results show that the sensor exhibits excellent linearity and directivity in response to static magnetic field.
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页数：7
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