Fiber optic magnetic field sensor based on the TbDyFe rod

被引：32
|
作者：
Chen, Feifei [1 ]
Jiang, Yi [1 ]
机构：
[1] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2014年 / 25卷 / 08期
基金：
中国国家自然科学基金;
关键词：
fiber optic sensors; interferometry; magnetic field measurement; TbDyFe; MAGNETOMETER; TRANSDUCERS;
D O I：
10.1088/0957-0233/25/8/085106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present, and experimentally demonstrate, a fiber optic magnetic field sensor for the measurement of a weak alternating magnetic field, based on a TbDyFe rod. The fiber optic magnetic field sensor is constructed in a Michelson interferometer configuration, and the phase-generated carrier demodulation is used to obtain the time-varying phase shift induced by the applied magnetic field. A high sensitivity of up to 3.6 x 10(-2)V mu T-1 (rms) with a resolution of 23pT/root Hz (rms) at 50 Hz is achieved. Experimental results show that the sensor exhibits excellent linearity and reversibility.
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页数：5
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