title: Magnetic field measurements based on Terfenol coated photonic crystal fibers.
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.
authors.affiliation: Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil. sully@puc-rio.br
authors.forename: Sully M M
authors.initials: SM
authors.lastname: Quintero
authors.forename: Cicero
authors.initials: C
authors.lastname: Martelli
authors.forename: Arthur M B
authors.initials: AM
authors.lastname: Braga
authors.forename: Luiz C G
authors.initials: LC
authors.lastname: Valente
authors.forename: Carla C
authors.initials: CC
authors.lastname: Kato
mesh_terms: D000497:Alloys / Q000737:chemistry*; D003460:Crystallization; D008280:Magnetics; D017785:Photons
chemical_list: D000497:Alloys