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Magnetic Field Measurements Based on Terfenol Coated Photonic Crystal Fibers
Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil
Department of Electronics, Federal University of Technology-Parana, Av Monteiro Lobato, s/n–km 04-Ponta Grossa, PR 84016-210, Brazil
* Author to whom correspondence should be addressed.
Received: 25 October 2011; in revised form: 21 November 2011 / Accepted: 23 November 2011 / Published: 28 November 2011
Abstract: A magnetic field sensor based on the integration of a high birefringence photonic crystal fiber and a composite material made of Terfenol particles and an epoxy resin is proposed. An in-fiber modal interferometer is assembled by evenly exciting both eigenemodes of the HiBi fiber. Changes in the cavity length as well as the effective refractive index are induced by exposing the sensor head to magnetic fields. The magnetic field sensor has a sensitivity of 0.006 (nm/mT) over a range from 0 to 300 mT with a resolution about ±1 mT. A fiber Bragg grating magnetic field sensor is also fabricated and employed to characterize the response of Terfenol composite to the magnetic field.
Keywords: photonic crystal fiber; high birefringence; magnetic field sensing; air-silica structured fiber; microstructured fiber
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MDPI and ACS Style
Quintero, S.M.M.; Martelli, C.; Braga, A.M.B.; Valente, L.C.G.; Kato, C.C. Magnetic Field Measurements Based on Terfenol Coated Photonic Crystal Fibers. Sensors 2011, 11, 11103-11111.
Quintero SMM, Martelli C, Braga AMB, Valente LCG, Kato CC. Magnetic Field Measurements Based on Terfenol Coated Photonic Crystal Fibers. Sensors. 2011; 11(12):11103-11111.
Quintero, Sully M. M.; Martelli, Cicero; Braga, Arthur M. B.; Valente, Luiz C. G.; Kato, Carla C. 2011. "Magnetic Field Measurements Based on Terfenol Coated Photonic Crystal Fibers." Sensors 11, no. 12: 11103-11111.