title: Tunable spectral enhancement of fiber supercontinuum.
abstract: We demonstrate tunable spectral enhancement of the supercontinuum generated in a microstructured fiber with a fiber long-period grating. The long-period grating leads to phase distortion and loss that, with subsequent high-intensity propagation in uniform fiber, evolves into an enhancement around the grating's resonant wavelengths. Wavelength tunability is achieved by varying the temperature or the ambient refractive index, and the spectral peak can be extinguished by immersing the grating in index-matching oil.
authors.affiliation: Australian Research Council Centre for Ultrahigh-Bandwidth Devices for Optical Systems, University of Sydney, New South Wales, Australia. yeom@physics.usyd.edu.au
authors.forename: Dong-Il
authors.initials: DI
authors.lastname: Yeom
authors.forename: Jeremy A
authors.initials: JA
authors.lastname: Bolger
authors.forename: Graham D
authors.initials: GD
authors.lastname: Marshall
authors.forename: Dane R
authors.initials: DR
authors.lastname: Austin
authors.forename: Boris T
authors.initials: BT
authors.lastname: Kuhlmey
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Withford
authors.forename: C
authors.initials: C
authors.lastname: Martijn de Sterke
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton