Refractive index modulation in media with saturable photosensitivity

Authors :: Julien Lumeau
Sergiy Mokhov
The College of Optics and Photonics [Orlando] (CREOL)
University of Central Florida [Orlando] (UCF)
RCMO (RCMO)
Institut FRESNEL (FRESNEL)
Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)
Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)
Source :: OSA Continuum, OSA Continuum, 2021, 4 (1), pp.72. ⟨10.1364/OSAC.412300⟩, OSA Continuum, OSA Publishing, 2021, 4 (1), pp.72. ⟨10.1364/OSAC.412300⟩
Publication Year :: 2021
Publisher :: HAL CCSD, 2021.
Abstract: International audience; 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.

Language :: English
ISSN :: 25787519
Database :: OpenAIRE
Journal :: OSA Continuum, OSA Continuum, 2021, 4 (1), pp.72. ⟨10.1364/OSAC.412300⟩, OSA Continuum, OSA Publishing, 2021, 4 (1), pp.72. ⟨10.1364/OSAC.412300⟩
Accession number :: edsair.doi.dedup.....31f249c106fbeb8869ae4b38f2cc5648
Full Text :: https://doi.org/10.1364/OSAC.412300⟩