Model of anisotropic nonlinearity in self-defocusing photorefractive media

We develop a phenomenological model of anisotropy in self-defocusing photorefractive crystals. In addition to an independent term due to nonlinear susceptibility, we introduce a nonlinear, non-separable correction to the spectral diffraction operator. The model successfully describes the crossover b...

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Bibliographic Details
Published in:Optics express 2015-09, Vol.23 (19), p.24426-24432
Main Authors: Barsi, C, Fleischer, J W
Format: Article
Language:English
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Summary:We develop a phenomenological model of anisotropy in self-defocusing photorefractive crystals. In addition to an independent term due to nonlinear susceptibility, we introduce a nonlinear, non-separable correction to the spectral diffraction operator. The model successfully describes the crossover between photovoltaic and photorefractive responses and the spatially dispersive shock wave behavior of a nonlinearly spreading Gaussian input beam. It should prove useful for characterizing internal charge dynamics in complex materials and for accurate image reconstruction through nonlinear media.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.024426