Influence of four-wave mixing and walk-off on the self-focusing of coupled waves

Details Influence of four-wave mixing and walk-off on the self-focusing of coupled waves Influence of four-wave mixing and walk-off on the self-focusing of coupled waves

1999-09-13

arxiv.org/abs/patt-sol/9909007v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.84.3302

Four-wave mixing and walk-off between two optical beams are investigated for fo cusing Kerr media. It is shown that four-wave mixing reinforces the self-focusi ng of mutually-trapped waves by lowering their power threshold for collapse, on ly when their phase mismatch is small. On the contrary, walk-off inhibits the c ollapse by detrapping the beams, whose partial centroids experience nonlinear o scillations.

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