Fiber optic magnetic field sensor based on the TbDyFe rod

Feifei Chen; Yi Jiang

doi:10.1088/0957-0233/25/8/085106

Fiber optic magnetic field sensor based on the TbDyFe rod

Feifei Chen, Yi Jiang

School of Optics and Photonics

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

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 3.6×10^-2VμT^-1 (rms) with a resolution of 23pT/√Hz (rms) at 50Hz is achieved. Experimental results show that the sensor exhibits excellent linearity and reversibility.

Original language	English
Article number	085106
Journal	Measurement Science and Technology
Volume	25
Issue number	8
DOIs	https://doi.org/10.1088/0957-0233/25/8/085106
Publication status	Published - 1 Aug 2014

Keywords

TbDyFe
fiber optic sensors
interferometry
magnetic field measurement

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10.1088/0957-0233/25/8/085106

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Chen, F., & Jiang, Y. (2014). Fiber optic magnetic field sensor based on the TbDyFe rod. Measurement Science and Technology, 25(8), Article 085106. https://doi.org/10.1088/0957-0233/25/8/085106

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AB - 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 3.6×10-2VμT-1 (rms) with a resolution of 23pT/√Hz (rms) at 50Hz is achieved. Experimental results show that the sensor exhibits excellent linearity and reversibility.

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Fiber optic magnetic field sensor based on the TbDyFe rod

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Keywords

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