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Passive interferometric interrogation of a magnetic field sensor using an erbium doped fiber optic laser with magnetostrictive transducer

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	Nascimento, I. M.; Baptista, M. J. M.; Jorge, P. A. S.; Cruz Muñoz, José Luis; Andrés, Miguel V. Perfil
	This document is a artículoDate2015
	An erbium doped (Er3+) fiber optic laser is proposed for magnetic field measurement. A pair of FBGsglued onto a magnetostrictive material (Terfenol-D rod) modulates the laser wavelength operation whensubject to a static or a time dependent magnetic field. A passive interferometer is employed to measure thelaser wavelength changes due to the applied magnetic field. A data acquisition hardware and a LabVIEWsoftware measure three phase-shifted signals at the output coupler of the interferometer and processthem using two distinct demodulation algorithms. Results show that sensitivity to varying magneticfields can be tuned by introducing a biasing magnetic field. A maximum error of 0.79% was found, formagnetic fields higher than 2.26 mT-RMS.
	Nascimento, I. M. Baptista, M. J. M. Jorge, P. A. S. Cruz Muñoz, José Luis Andrés, Miguel V. 2015 Passive interferometric interrogation of a magnetic field sensor using an erbium doped fiber optic laser with magnetostrictive transducer Sensors and Actuators A-Physical 235 227 233
	https://doi.org/10.1016/j.sna.2015.10.021