Abstract
The photorefractive properties of lithium niobate crystals depend strongly on the kind of doping admixture. Study of LiNbO3 crystals with various doping admixtures using photorefractive light scattering allows insight into the processes taking place in the crystals. This paper presents new experimental results of non-selective and selective photorefractive light scattering investigations into rhodium-doped lithium niobate crystals and proposes a model to explain the experimental data.
Highlights
IntroductionPhotorefractive crystals, lithium niobate (LiNbO3) crystals, are a prospective material for optical units for information storage and processing [1,2,3]
Photorefractive crystals, lithium niobate (LiNbO3) crystals, are a prospective material for optical units for information storage and processing [1,2,3].The basis for the model proposed in this study is the assumption that the volumetric phase diffraction grating that is recorded due to an interference of pumping radiation and Rayleigh primary scattering corresponds to each direction in which the photorefractive scattering is observed [1]
It can be argued that the proposed model is capable of describing the basic regularities of the non-selective photorefractive light scattering (PRLS) in the LiNbO3 crystals
Summary
Photorefractive crystals, lithium niobate (LiNbO3) crystals, are a prospective material for optical units for information storage and processing [1,2,3]. The basis for the model proposed in this study is the assumption that the volumetric phase diffraction grating that is recorded due to an interference of pumping radiation and Rayleigh primary scattering corresponds to each direction in which the photorefractive scattering is observed [1]. The orientation and initial amplitude of each grating are determined by the direction in which the Rayleigh scattering is made During recording such grating, Bragg diffraction of both recording beams is realized. That is, based on the immediately observed pattern, it can be concluded that only for those gratings on which a diffraction of the pumping beam is performed in the directions where the photorefractive light scattering (PRLS) is recorded, a distinct amplification of the primary light noise takes place. On the basis of this model, the selective PRLS indicatrix in the LiNbO3:Rh crystals was calculated
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