Magnetic field sensor of enhanced sensitivity and temperature self-calibration based on silica fiber Fabry-Perot resonator with silicone cavity | Zendy

Bin Zhou | Zendy; Changtao Lu | Zendy; Barèrèm-Mêlgueba Mao | Zendy; HwaYaw Tam | Zendy; Sailing He | Zendy

Open Access

Magnetic field sensor of enhanced sensitivity and temperature self-calibration based on silica fiber Fabry-Perot resonator with silicone cavity

Author(s) -

Bin Zhou,

Changtao Lu,

Barèrèm-Mêlgueba Mao,

HwaYaw Tam,

Sailing He

Publication year - 2017

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.25.008108

Subject(s) - materials science , fabry–pérot interferometer , optics , fiber bragg grating , silicone rubber , resonator , magnetic field , optical fiber , sensitivity (control systems) , fiber optic sensor , fiber , silicone , optoelectronics , composite material , wavelength , physics , quantum mechanics , electronic engineering , engineering

In this paper, a magnetic field sensor with enhanced sensitivity based on a fiber Fabry-Perot (F-P) cavity formed by a pair of identical fiber Bragg gratings (FBGs) is demonstrated. The F-P cavity which was filled with silicone rubber was bonded to a magnetic alloy at two positions such that when longitudinal strain is applied, the cavity is lengthened while the FBGs was virtually strain-free, effectively magnified the magnetic-field induced strain of the magnetic alloy. The FBGs could also be used for temperature-compensation because the FBG spectrum change is negligible compared to the F-P spectrum.

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