Fiber optic magnetic field sensor using spectral modulation encoding

Michel Lequime; Carole Meunier; Hugues Giovannini

doi:10.1117/12.24749

1 February 1991 Fiber optic magnetic field sensor using spectral modulation encoding

Michel Lequime, Carole Meunier, Hugues Giovannini

Proceedings Volume 1367, Fiber Optic and Laser Sensors VIII; (1991) https://doi.org/10.1117/12.24749
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

This paper is devoted to the description of a new type of fiber optic magnetic field sensor based on spectral modulation encoding techniques. This device uses a Faraday magneto-optic element as transducer and converts the rotation of the plane of polarization of the light induced by the magnetic field into a small change in the large optical path difference provided by a birefringent coding plate. The use of a broadband source and of an interferometric detector, with an optical path difference matched to the sensor one, allows to reach high resolution and perfect down-lead insensitivity. A dual-wavelength arrangement is proposed to determine the temperature and magnetic fied values with the same probe.

Citation Download Citation

Michel Lequime, Carole Meunier, and Hugues Giovannini "Fiber optic magnetic field sensor using spectral modulation encoding", Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); https://doi.org/10.1117/12.24749

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