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Proceedings Paper

Fiber optic magnetic field sensor using spectral modulation encoding
Author(s): Michel Lequime; Carole Meunier; Hugues Giovannini
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Paper 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.

Paper Details

Date Published: 1 February 1991
PDF: 7 pages
Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); doi: 10.1117/12.24749
Show Author Affiliations
Michel Lequime, Bertin & Cie (France)
Carole Meunier, Bertin & Cie (France)
Hugues Giovannini, Ecole Nationale Superieure de Physique de Marseille (France)


Published in SPIE Proceedings Vol. 1367:
Fiber Optic and Laser Sensors VIII
Ramon P. DePaula; Eric Udd, Editor(s)

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