The features of linear and nonlinear propagation of light beams in one-dimensional photorefractive photonic superlattices
in bulk lithium niobate and in planar waveguides on this material are experimentally studied. The superlattices are
optically induced in bulk samples and in planar waveguides using two-beam holographic recording method and optical
projection scheme with coherent and incoherent light sources.
We experimentally investigate effects of linear and nonlinear propagation of light beams within one-dimensional
photonic superlattices fabricated in bulk photorefractive lithium niobate samples and in photorefractive planar
waveguides by optical induction technique. In other case similar superlattices are formed by optical modulation of
periodic waveguide arrays produced in lithium niobate by thermal diffusion of titanium and iron. The linear localization
of light power is experimentally observed in superlattices of all kinds and proved using numerical simulations of light
propagation within such structures. The features of nonlinear behavior of light at its propagation in superlattices is also
experimentally demonstrated in a configuration of their single-channel excitation.
Photorefractive one-dimensional photonic lattices are optically induced in iron-doped lithium niobate. Discrete linear diffraction and formation of bright gap solitons due to the spatial self-action of light beams within such lattices are experimentally investigated at wavelength of 633 nm.
Photorefractive one-dimensional photonic lattices are optically induced in iron-doped lithium niobate. Discrete linear diffraction and formation of bright gap solitons due to nonlinear self-action of light beams within such lattices are experimentally investigated at wavelength of 633 nm.
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