Photorefractive effect in planar waveguides in cubic crystals

Yuri R. Salikaev; Stanislav M. Shandarov

doi:10.1117/12.185157

25 August 1994 Photorefractive effect in planar waveguides in cubic crystals

Yuri R. Salikaev, Stanislav M. Shandarov

Proceedings Volume 2212, Linear and Nonlinear Integrated Optics; (1994) https://doi.org/10.1117/12.185157
Event: Integrated Optoelectronics '94, 1994, Lindau, Germany

Abstract

Two-beam interaction of waveguide modes in planar waveguide in electro-optic crystal has been considered within the band-transport model, taking into account one photoactive level only. Equations for amplitudes of zero and first spatial harmonics of space-charge field potential have been obtained for interactions in the waveguide with short diffusion length and without of trap saturation. Consideration of a steady-state has been performed for small modulation index of interference light pattern and for case of the dark conductivity is a factor ore the photoconductivity is a factor. For the first case we obtain distributions of space-charge field components for different TE-TE and TM-TM interactions in the waveguide with an arbitrary large increment of refractive index. For the second case we obtain distributions of space-charge field components within waveguide layer only for TE₀-TE₀ and TM₀-TM₀ interactions only in waveguide with step-shaped profile of refractive index. At initial section of the recording the distributions of space-charge field components are the same in distribution at a steady-state for the case of the dark conductivity is a factor. The values of dimensionless overlap factors of space-charge field components with interference light pattern have been calculated for planar waveguide with large increment of refractive index.

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Yuri R. Salikaev and Stanislav M. Shandarov "Photorefractive effect in planar waveguides in cubic crystals", Proc. SPIE 2212, Linear and Nonlinear Integrated Optics, (25 August 1994); https://doi.org/10.1117/12.185157

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KEYWORDS

Waveguides

Planar waveguides

Crystals

Refractive index

Diffusion

Modulation

Waveguide modes

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