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Proceedings Paper

High-speed FBG interrogation system insensitive to fiber link attenuation for magnetic field sensing
Author(s): João Paulo V. Fracarolli; Claudio Floridia; Joao B. Rosolem; Ariovaldo A. Leonardi; Danilo C. Dini; Paulo Ivã G. Dilli; Erlon V. da Silva; Marcéu C. dos Santos; Fabiano Fruett
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Paper Abstract

A high-speed FBG interrogation method for magnetic field sensing is proposed. A FBG attached to a magnetostrictive material (Terfenol-D) was used to show the output invariance when increasing the attenuation on the optical link. This was achieved by computing the ratio between the sensing and the reference signals, both generated using different DFB lasers properly tuned. The output remained invariant to attenuations up to 12 dB. Also, the system’s interrogation speed was tested and compared to a commercial solution. While the commercial model was limited by its 6 kHz sampling frequency, this method provided responses up to 60 kHz.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347Q (28 September 2015); doi: 10.1117/12.2192674
Show Author Affiliations
João Paulo V. Fracarolli, CPqD Foundation (Brazil)
Claudio Floridia, CPqD Foundation (Brazil)
Joao B. Rosolem, CPqD Foundation (Brazil)
Ariovaldo A. Leonardi, CPqD Foundation (Brazil)
Danilo C. Dini, CPqD Foundation (Brazil)
Paulo Ivã G. Dilli, Tractebel Energia S.A. (Brazil)
Erlon V. da Silva, Tractebel Energia S.A. (Brazil)
Marcéu C. dos Santos, Tractebel Energia S.A. (Brazil)
Fabiano Fruett, Univ. of Campinas (Brazil)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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