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Opt Lett. 2005 Apr 1;30(7):750-2.

Dynamic instability of self-induced bidirectional waveguides in photorefractive media.

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  • 1Institute of Applied Physics, Westfälische Wilhelms-Universität, Corrensstrasse 2, D-48149 Münster, Germany.


We report on the experimental observation of a dynamic instability in the interaction of counterpropagating self-trapped beams in a photorefractive strontium barium niobate crystal. While the interaction of copropagating spatial optical solitons exhibits only transient dynamics, resulting in a final steady state, the counterpropagating geometry supports a dynamic instability mediated by intrinsic feedback. Experimental observations are compared with and found to be in qualitative agreement with numerical simulations.

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