Self-focusing of an optical paraxial beam in a photorefractive cubic crystal exposed to a strong external electric field E 0 of arbitrary orientation has been considered with regard to the Pockels effect. The best localization of radiation is shown to be attained when the vector E 0 is oriented along diagonals of the cubic cell. Numerical modeling revealed that the beam width increased significantly for non-optimal electric field orientations.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 76, No. 4, pp. 534–541, July–August, 2009.
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Kochetkov, S.M. Influence of an external electric field on self-focusing of light beams in cubic photorefractive crystals. J Appl Spectrosc 76, 505–513 (2009). https://doi.org/10.1007/s10812-009-9231-x
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DOI: https://doi.org/10.1007/s10812-009-9231-x