Counterpropagating beams in biased photorefractive crystals: Anisotropic theory

Details Counterpropagating beams in biased photorefractive crystals: Anisotropic theory Counterpropagating beams in biased photorefractive crystals: Anisotropic theory

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrve..71a6610m&link_type=abstract

Physical Review E, vol. 71, Issue 1, id. 016610

Physics

3

Optical Solitons, Nonlinear Guided Waves, Beam Trapping, Self-Focusing And Defocusing, Self-Phase Modulation

Scientific paper

We formulate an anisotropic nonlocal theory of the space charge field induced by the coherent counterpropagating beams in biased photorefractive crystals. We establish that the competition between the drift and diffusion terms has to be taken into account when the crystal ĉ axis is tilted with respect to the propagation direction of the beams. We demonstrate that this configuration combines the features of both spatial soliton formation without energy exchange and two-wave mixing with energy exchange leading to pattern formation.

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