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Spontaneous 2D modulation instability in second harmonic generation process

Authors:	Michaël Delqué Gil Fanjoux Marc Haelterman

Institution:	^a Service OPERA-photonique, CP194/5, Université Libre de Bruxelles U.L.B., Avenue F.D. Roosevelt, 1050 Bruxelles, Belgium ^b Département d'Optique P.M. Duffieux, Institut FEMTO-ST, Université de Franche-Comté, CNRS UMR 6174, F-25030 Besançon, France

Abstract:	Two-dimensional modulation instability (2DMI) is experimentally demonstrated in a classical second harmonic generation setup. The spatial spectrum is measured and reveals typical 2DMI bands, in agreement with the analytical MI model. These observations are confirmed by (2 + 1)D numerical simulations.

Keywords:	Second harmonic generation Modulation instability Quadratic soliton
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