Magnetic field sensor with Terfenol-D thin-film coated FBG

Ricardo M. Silva; G. Chesini; C. J. Gouveia; A. B. Lobo Ribeiro; O. Frazão; C. M. B. Cordeiro; P. A. S. Jorge

doi:10.1117/12.975169

17 October 2012 Magnetic field sensor with Terfenol-D thin-film coated FBG

Ricardo M. Silva, G. Chesini, C. J. Gouveia, A. B. Lobo Ribeiro, O. Frazão, C. M. B. Cordeiro, P. A. S. Jorge

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84213C (2012) https://doi.org/10.1117/12.975169
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this work a magnetic field sensor based on an FBG coated with a thin film of Terfenol-D is presented. The sensor was tested with two optical interrogation systems: one, a scanning laser system with a 1 pm resolution, and the other a differential white light interferometer (WLI). The results obtained in the magnetic field range of 20 mT to 100 mT, show the possibility of increasing the magnetic field measurement resolution, with temperature fluctuations invariance, by a factor of 4.5 when using the WLI system.

Citation Download Citation

Ricardo M. Silva, G. Chesini, C. J. Gouveia, A. B. Lobo Ribeiro, O. Frazão, C. M. B. Cordeiro, and P. A. S. Jorge "Magnetic field sensor with Terfenol-D thin-film coated FBG", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213C (17 October 2012); https://doi.org/10.1117/12.975169

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