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- W2049003023 abstract "The propagation of light beams is studied in a planar photorefractive waveguide fabricated by high-temperature diffusion of metal ions in the Z-cut substrate of the 3m symmetry crystal. The wave equations are obtained for single-mode light beams with TE and TM polarisations in planar diffusion waveguides, which take into account the two-dimensional distribution of the optical field. Expressions are found for a nonlinear change in the refractive index when the photovoltaic mechanism makes a dominant contribution to the photorefractive effect. The propagation of single-mode light beams is analysed numerically for a Ti:Fe:LiNbO3 waveguide fabricated by the successive diffusion of titanium and iron into lithium niobate. It is shown that single-mode light beams with a smooth amplitude envelope can propagate without significant changes in the region of a dip in the intensity modelling a dark soliton. The relations between the amplitude and width of a dark spatial soliton are obtained for the TM modes of a photorefractive planar waveguide." @default.
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- W2049003023 date "2003-11-30" @default.
- W2049003023 modified "2023-10-18" @default.
- W2049003023 title "Dark spatial optical solitons in planar gradient waveguides in the<i>Z</i>-cut of the 3<i>m</i>symmetry crystals" @default.
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- W2049003023 doi "https://doi.org/10.1070/qe2003v033n11abeh002539" @default.
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