Influence of four-wave mixing and walk-Off on the self-focusing of coupled waves |
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Authors: | Berge Bang Krolikowski |
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Affiliation: | Commissariat a l'Energie Atomique, CEA/Bruyeres-le-Chatel, B.P. 12, 91680 Bruyeres-le-Chatel, France. |
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Abstract: | Four-wave mixing and walk-off between two optical beams are investigated for focusing Kerr media. It is shown that four-wave mixing reinforces the self-focusing of mutually trapped waves by lowering their power threshold for collapse, only when their phase mismatch is small. On the contrary, walk-off inhibits the collapse by detrapping the beams, whose partial centroids experience nonlinear oscillations. |
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