A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

Jeson Chen; Si-Yu Huang; Cheng-Yu Lin; Wen-Fung Liu

doi:10.3390/photonics9020102

Photonics (Feb 2022)

A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

Jeson Chen,
Si-Yu Huang,
Cheng-Yu Lin,
Wen-Fung Liu

Affiliations

Jeson Chen: Department of Electronic Engineering, Feng Chia University, Taichung City 407802, Taiwan
Si-Yu Huang: Department of Electrical Engineering, Feng Chia University, Taichung City 407802, Taiwan
Cheng-Yu Lin: Department of Electrical Engineering, Feng Chia University, Taichung City 407802, Taiwan
Wen-Fung Liu: Department of Electrical Engineering, Feng Chia University, Taichung City 407802, Taiwan

DOI: https://doi.org/10.3390/photonics9020102
Journal volume & issue: Vol. 9, no. 2
p. 102

Abstract

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A new type of low-frequency magnetic-field sensor based on fiber Bragg gratings (FBGs) was experimentally demonstrated for measuring the DC to low-frequency magnetic field. The operating mechanism of this AC magnetic sensor is based on the strain exerted by a loaded magnet on the sensing structure, which causes center-wavelength shifts of FBG. The achieved sensitivity was 8.16 pm/G with a resolution of 3 Gauss at ambient conditions. The proposed FBG magnetic sensor is easy to use, compact, and suitable for DC to low-frequency magnetic sensing applications.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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