Formation and light guiding properties of dark solitons in one-dimensional waveguide arrays

Details Formation and light guiding properties of dark solitons in one-dimensional waveguide arrays Formation and light guiding properties of dark solitons in one-dimensional waveguide arrays

2006-07-14

arxiv.org/abs/nlin/0607030v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 6 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevE.74.065601

We report on the formation of dark discrete solitons in a nonlinear periodic system consisting of evanescently-coupled channel waveguides that are fabricated in defocusing lithium niobate. Localized nonlinear dark modes displaying a phase jump in the center that is located either on-channel (mode A) or in-between channels (mode B) are formed, which is to our knowledge the first experimental observation of mode B. By numerical simulations we find that the saturable nature of the nonlinearity is responsible for the improved stability of mode B. The ability of the induced refractive index structures to guide light of a low-power probe beam is demonstrated.

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