title: Temperature coefficient of the high-frequency guided acoustic mode in a photonic crystal fiber.
abstract: High-frequency guided acoustic Brillouin modes have recently been observed in small-core silica photonic crystal fibers. In this paper, we investigate the temperature dependence of the optical sideband frequency generated by one of these guided acoustic waves. The experimental results show a temperature coefficient of 100 kHz/°C at an acoustic resonance frequency of 1.15 GHz and are in very good agreement with the theoretical predictions. This coefficient demonstrates a temperature sensitivity 10 times larger than that previously reported in conventional single-mode fibers, which is promising in view of potential applications to optical fiber sensors.
authors.affiliation: Institut FEMTO-ST, Université de Franche-Comté, CNRS UMR 6174, 25030 Besançon, France.
authors.forename: Emile
authors.initials: E
authors.lastname: Carry
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Beugnot
authors.forename: Birgit
authors.initials: B
authors.lastname: Stiller
authors.forename: Min W
authors.initials: MW
authors.lastname: Lee
authors.forename: Hervé
authors.initials: H
authors.lastname: Maillotte
authors.forename: Thibaut
authors.initials: T
authors.lastname: Sylvestre