title: Chirped switchable reflection grating in holographic polymer-dispersed liquid crystal for spectral flattening in free-space optical communication systems.
abstract: We report the design and fabrication of a chirped switchable reflective grating (CSRG) recorded in a holographic polymer-dispersed liquid-crystal material. This CSRG is a spatial wavelength-selective flattener in a free-space dynamic gain equalizer for use in wavelength-division multiplexing (WDM) networks. Prelimenary experimental results show that this device permits the management of the spectral power of a WDM stream with an attenuation range of 6 dB. The polarization-dependent loss introduced by the CSRG is shown to be less than 0.1 dB.
authors.affiliation: Groupe des Ecoles des Telecommunications/Department of Optics, Ecole Nationale Supérieure des Telécommunications de Bretagne, Technopôle de Brest Iroise, CS 83818, 29238 Brest, France. jl.Kaiser@enst-bretagne.fr
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Kaiser
authors.forename: Raymond
authors.initials: R
authors.lastname: Chevallier
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: de Bougrenet de la Tocnaye
authors.forename: Hayqing
authors.initials: H
authors.lastname: Xianyu
authors.forename: Gregory Philip
authors.initials: GP
authors.lastname: Crawford