title: Frequency-selective excitation of guided acoustic modes in a photonic crystal fiber.
abstract: We present experimental and numerical results demonstrating the simultaneous frequency-selective excitation of several guided acoustic Brillouin modes in a photonic crystal fiber with a multi-scale structure design. These guided acoustic modes are identified by using a full vector finite-element model to result from elastic radial vibrations confined by the wavelength-scale air-silica microstructure. We further show the strong impact of structural irregularities of the fiber on the frequency and modal shape of these acoustic resonances.
authors.affiliation: Institut FEMTO-ST, Université de Franche-Comté, CNRS UMR 6174, Besançon, France. birgit.stiller@femto-st.fr
authors.forename: B
authors.initials: B
authors.lastname: Stiller
authors.forename: M
authors.initials: M
authors.lastname: Delqué
authors.forename: J-C
authors.initials: JC
authors.lastname: Beugnot
authors.forename: M W
authors.initials: MW
authors.lastname: Lee
authors.forename: G
authors.initials: G
authors.lastname: Mélin
authors.forename: H
authors.initials: H
authors.lastname: Maillotte
authors.forename: V
authors.initials: V
authors.lastname: Laude
authors.forename: T
authors.initials: T
authors.lastname: Sylvestre