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Proceedings Paper

Magnetic field sensor based on reflection spectrum measurement of fiber Bragg grating
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Paper Abstract

A novel magnetic field sensor by using an optical fiber Bragg grating (FBG) cascaded by a cleaved optical fiber end, which is face surrounded with magnetic fluid (MF), is experimentally demonstrated. Through Fresnel reflection (FR) of the fiber end face, side mode suppression ratio (SMSR) of reflection spectrum of the FBG is tuned by refractive index (RI) of the MF, which is sensitivity to the external magnetic field. As a result, magnetic field measurement is successfully achieved. Compared with previously reported methods based on FR of a fiber end only, it eliminates the influence of power level fluctuation of the optical source and therefore improves the measurement accuracy and stability. Furthermore, temperature can be measured simultaneously by monitoring wavelength shift of the FBG.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571F (2 June 2014); doi: 10.1117/12.2059450
Show Author Affiliations
Jingyi Yang, China Jiliang Univ. (China)
Xinyong Dong, China Jiliang Univ. (China)
Shangzhong Jin, China Jiliang Univ. (China)
Chi Chiu Chan, Nanyang Technological Univ. (Singapore)
Perry Ping Shum, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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