Laser beam self-channeling in photorefractive waveguides

Erik Raita; Alexei A. Kamshilin; A. V. Khomenko

doi:10.1117/12.262598

27 December 1996 Laser beam self-channeling in photorefractive waveguides

Erik Raita, Alexei A. Kamshilin, A. V. Khomenko

Proceedings Volume 2969, Second International Conference on Optical Information Processing; (1996) https://doi.org/10.1117/12.262598
Event: Second International Conference on Optical Information Processing, 1996, St. Petersburg, Russian Federation

Abstract

The self-channeling of a laser beam in Bi₁₂TiO₂₀ waveguide-like crystals has been studied both experimentally and theoretically. Total internal reflections of strong fanning beams and their coupling with the pump beam result in the light intensity redistribution inside the crystal and in the generation of the photorefractive surface wave. A theoretical model of the intensity redistribution is presented considering the light energy flow from the pump beam to the fanning and backwards after the fanning beam reflection. A numerical simulation f the model shows that the total internal reflection off the side surface, towards which the light energy flow is directed, is responsible for the light energy self-channeling. Anomalously fast photorefractive response as well as its acceleration with increasing amplitude of electric field applied to the sample were experimentally demonstrated.

Citation Download Citation

Erik Raita, Alexei A. Kamshilin, and A. V. Khomenko "Laser beam self-channeling in photorefractive waveguides", Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996); https://doi.org/10.1117/12.262598

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