Magneto-Optical Sensor Based on Fiber Bragg Gratings and a Magnetostrictive Material

Rafael Amat; H. García-Miquel; D. Barrera; Galina V. Kurlyandskaya; Salvador Sales

doi:10.4028/www.scientific.net/KEM.644.232

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 644Magneto-Optical Sensor Based on Fiber Bragg...

Magneto-Optical Sensor Based on Fiber Bragg Gratings and a Magnetostrictive Material

Abstract:

We have designed a magneto-optical sensor based on fiber Bragg grating (FBG) and Metglas 2605CO (Fe₆₇Co₁₈B₁₄Si₁) material with magnetostriction coefficient of 35ppm. The FBG sensor is glued between two sheets of Metglas. FBG-based detectors are sensitive to both temperature changes (approximately 10pm/°C) and mechanical stress (approx. 1.15pm). Also due to the thermal expansion of Metglas, it becomes imperative to isolate the joint effects of thermal expansion of Metglas and the FBG temperature drifts. This is achieved by introducing an additional FBG used as a temperature sensor. We have characterized the responses of the sensor in two directions simultaneously: parallel and perpendicular to the direction of the applied magnetic field.

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Periodical:

Key Engineering Materials (Volume 644)

Pages:

232-235

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.644.232

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Online since:

May 2015

Authors:

Rafael Amat*, H. García-Miquel, D. Barrera, Galina V. Kurlyandskaya, Salvador Sales

Keywords:

Fiber Bragg Grating, Fiber Optic, Magneto-Optical Sensors, Magnetostriction, Metglas

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References

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