title: Refractometric sensor based on a phase-shifted long-period fiber grating.
abstract: A refractometric sensor based on a phase-shifted long-period fiber grating written by electric-arc discharges is presented. Transmission and reflective configurations for refractive index measurements are studied. It is observed that the reflective topology permits better performance compared with the transmission one, which is the approach normally utilized in the context of long-period fiber sensing. The resolution achieved in the measurement of refractive index enables the application of this sensing head structure in demanding situations, such as the measurement of the level of salinity of water.
authors.affiliation: Universidade Tecnológica Federal do Paraná, Avenida Sete de Setembro, Brazil. rfalate@yahoo.com
authors.forename: Rosane
authors.initials: R
authors.lastname: Falate
authors.forename: Orlando
authors.initials: O
authors.lastname: Frazão
authors.forename: Gaspar
authors.initials: G
authors.lastname: Rego
authors.forename: José Luís
authors.initials: JL
authors.lastname: Fabris
authors.forename: José Luís
authors.initials: JL
authors.lastname: Santos
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers