Magnetic field sensing with an in-line Fabry-Perot interferometer based on capillary optical fiber and Terfenol-D

Paula M. P. Gouvêa; Greice K. B. Costa; Larissa M. B. Soares; João M. B. Pereira; Fernando C. Fávero; Arthur M. B. Braga; Antonio C. Bruno; Isabel C. S. Carvalho

doi:10.1117/12.2194827

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28 September 2015 Magnetic field sensing with an in-line Fabry-Perot interferometer based on capillary optical fiber and Terfenol-D

Paula M. P. Gouvêa, Greice K. B. Costa, Larissa M. B. Soares, João M. B. Pereira, Fernando C. Fávero, Arthur M. B. Braga, Antonio C. Bruno, Isabel C. S. Carvalho

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963438 (2015) https://doi.org/10.1117/12.2194827
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

In this paper we discuss results obtained with an in-line Fabry-Perot interferometer (FPI) built by splicing a small section of capillary fiber between two pieces of standard single mode fiber, resulting in a rectangular air cavity. The FPIs were characterized regarding sensitivity to temperature and longitudinal strain. The FPIs were bonded to pieces of Terfenol-D, a magnetostrictive alloy, to be used as magnetic field sensors. Fiber Bragg Gratings were also bonded to Terfenol-D for comparison. The FPI based on capillary optical fiber and Terfenol-D showed a higher sensitivity to an applied magnetic field when compared to an FBG.

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Paula M. P. Gouvêa, Greice K. B. Costa, Larissa M. B. Soares, João M. B. Pereira, Fernando C. Fávero, Arthur M. B. Braga, Antonio C. Bruno, and Isabel C. S. Carvalho "Magnetic field sensing with an in-line Fabry-Perot interferometer based on capillary optical fiber and Terfenol-D", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963438 (28 September 2015); https://doi.org/10.1117/12.2194827

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