Waveguide-based fiber optic magnetic field sensor with directional sensitivity

Hans B. Sohlstrom; Kjell G. Svantesson

doi:10.1117/12.45986

1 August 1991 Waveguide-based fiber optic magnetic field sensor with directional sensitivity

Hans B. Sohlstrom, Kjell G. Svantesson

Proceedings Volume 1511, Fiber Optic Sensors: Engineering and Applications; (1991) https://doi.org/10.1117/12.45986
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

Design and performance of an extrinsic guided wave fiber optic magnetic field sensor is reported. The sensor utilizes a substituted YIG (yttrium iron garnet, Y3Fe5O12) thin film as the waveguiding sensing element. A polarization maintaining fiber downlead was used to provide insensitivity to both power and loss fluctuations. The design makes it possible to determine both the magnitude and the sign of the magnetic field. Measurement results indicate a usable measurement range of at least several mT with a noise equivalent magnetic field level of less than 8 nT/(root)Hz.

Citation Download Citation

Hans B. Sohlstrom and Kjell G. Svantesson "Waveguide-based fiber optic magnetic field sensor with directional sensitivity", Proc. SPIE 1511, Fiber Optic Sensors: Engineering and Applications, (1 August 1991); https://doi.org/10.1117/12.45986

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