Comparative studies are made of the photorefractive scattering of light in nonlinear single crystals of lithium niobate with congruent compositions (LiNbO3) doped with "photorefractive" Cu [0.015 mass %] and "nonphotorefractive" Zn [0.5 mass %] cations. For the first time it is found that single crystals doped with "photorefractive" and "nonphotorefractive" cations have different indicatrices for photorefractive light scattering. The aperture angle for photorefractive scattering reaches its steady state value more rapidly with high laser powers than with low. However, at high powers laser induced heating of the crystal is greater, and this leads to a narrowing of the scattering indicatrix. It is also found that photorefractive scattering in these single crystals depends on the region of the boule from which a sample has been cut. This indicates that there is a nonuniform distribution over the boule of the imperfections with localized electrons which determine the magnitude of the photorefractive effect.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 77, No. 1, pp. 89–94, January–February, 2010.
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Antonycheva, E.A., Syui, A.V., Sidorov, N.V. et al. Light scattering in single crystals of nonlinear-optical photorefractive LiNbO3:Cu and LiNbO3:Zn. J Appl Spectrosc 77, 80–85 (2010). https://doi.org/10.1007/s10812-010-9296-6
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DOI: https://doi.org/10.1007/s10812-010-9296-6