Self-action of light beams in electrically biased optical waveguides in lithium niobate

V. Shandarov; E. Smirnov

doi:10.1117/12.648219

6 December 2006 Self-action of light beams in electrically biased optical waveguides in lithium niobate

V. Shandarov, E. Smirnov

Proceedings Volume 6023, Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals; 60230V (2006) https://doi.org/10.1117/12.648219
Event: Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 2005, Alushta, Ukraine

Abstract

We experimentally investigate some features of the self-defocusing of light beams as well as the relaxation of waveguide channels induced by dark spatial solitons at wavelength of 632.8 nm within slab optical waveguides formed in lithium niobate by iron diffusion or combined diffusion of titanium, iron and copper. We also study an influence of the externally applied electric field on both, spatial self-action of single beam within such waveguides and external focused beam which propagates in direction normal to the waveguide surface. Experiments show that for lowest TE modes the photovoltaic nonlinearity results in the fast but not very strong beam defocusing and for modes of higher order this effect is slower but much stronger. It is also demonstrated that at suitable light intensity the screening of the external electric field significantly contributes to the beam self-action at its initial stage even for mediate value of applied electric field.

Citation Download Citation

V. Shandarov and E. Smirnov "Self-action of light beams in electrically biased optical waveguides in lithium niobate", Proc. SPIE 6023, Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 60230V (6 December 2006); https://doi.org/10.1117/12.648219

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