ECM - École Centrale de Marseille (Pôle de l'étoile - Technopole de Château-Gombert - 38 rue Frédéric Joliot-Curie - 13013 Marseille - France)
AMU - Aix Marseille Université : UMR7249/ UMR 6133 (Aix-Marseille Université
Jardins du Pharo
58 Boulevard Charles Livon
13284 Marseille cedex 7 - France)
Abstract : Permanent change of the refractive index of photo-thermo-refractive glass can be achieved by exposure to ultraviolet light followed by thermal development. The dependence of the change on the dosage is nonlinear because the photochemical process of photosensitivity involves saturation. With a holographic recording of Bragg gratings inside glass, a sinusoidally modulated dosage is imprinted into distorted modulation of the refractive index. We investigate this distorted modulation and derive analytical expressions for the amplitudes of its spatial harmonics.
https://hal-amu.archives-ouvertes.fr/hal-03407083 Contributor : Julien LumeauConnect in order to contact the contributor Submitted on : Thursday, October 28, 2021 - 11:31:28 AM Last modification on : Friday, April 1, 2022 - 3:49:04 AM Long-term archiving on: : Saturday, January 29, 2022 - 6:50:08 PM
Sergiy Mokhov, Julien Lumeau. Refractive index modulation in media with saturable photosensitivity. OSA Continuum, OSA Publishing, 2021, 4 (1), pp.72. ⟨10.1364/OSAC.412300⟩. ⟨hal-03407083⟩