title: Fundamental-mode cutoff in liquid-filled Y-shaped microstructured fibers with Ge-doped core.
abstract: We report on the cutoff characteristics of a Ge-doped Y-shaped microstructured fiber in which the holes are filled with a liquid of refractive index higher than silica but lower than the Ge-doped core. It is found that the cutoff wavelength was very sensitive to temperature variations as a result of the refractive index changes of the liquid. The basic properties of such a fiber permit the fabrication of wideband tunable short-pass filters, as well as temperature sensors with high sensitivity. A temperature sensitivity of 25 nm/degrees C is reported.
authors.affiliation: Departamento de Física Aplicada-Institut Universitari de Ciéncia dels Materials, Universidad de Valencia, Burjassot, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Torres-Peiró
authors.forename: A
authors.initials: A
authors.lastname: Díez
authors.forename: J L
authors.initials: JL
authors.lastname: Cruz
authors.forename: M V
authors.initials: MV
authors.lastname: Andrés