Acceleration of a photorefractive response in Bi12TiO20 crystals

Erik Raita; Alexei A. Kamshilin

doi:10.1117/12.266539

4 February 1997 Acceleration of a photorefractive response in Bi₁₂TiO₂₀ crystals

Erik Raita, Alexei A. Kamshilin

Proceedings Volume 2967, Optical Inorganic Dielectric Materials and Devices; (1997) https://doi.org/10.1117/12.266539
Event: International Conference on Advanced Optical Materials and Devices, 1996, Riga, Latvia

Abstract

Significant acceleration of a photorefractive response has been obtained in a thin and long Bi₁₂TiO₂₀ waveguide-like crystals using the nonlinear self-channeling of a laser beam. 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 of high intensity, which speeds up the photorefractive response by enhancing both the beam intensity and the interaction length. The exceptionally fast photorefractive response as well as its anomalous acceleration with the increasing amplitude of ac electric field applied to the crystal were experimentally demonstrated. The photorefractive surface wave can be used as the energy source for the amplification of weak signals in two-wave mixing experiments. This fact may lead to a fabrication of fast photorefractive devices operating with low power laser-diodes.

Citation Download Citation

Erik Raita and Alexei A. Kamshilin "Acceleration of a photorefractive response in Bi₁₂TiO₂₀ crystals", Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); https://doi.org/10.1117/12.266539

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