Abstract: We study the effect of Two-Photon Absorption (TPA) nonlinear losses on Gaussian pulses, with power that exceeds the critical power for self-focusing, propagating in bulk kerr media. Experiments performed in fused silica and silicon highlight a spontaneous reshaping of the input pulse into a pulsed Bessel beam. A filament is formed in which sub-diffractive propagation is sustained by the Bessel-nature of the pulse.

Kerr-induced spontaneous Bessel beam formation in the regime of strong two-photon absorption

BRAGHERI, FRANCESCA;TARTARA, LUCA;TRITA, ANDREA;HENIN, STEFANO;CRISTIANI, ILARIA;
2008

Abstract

Abstract: We study the effect of Two-Photon Absorption (TPA) nonlinear losses on Gaussian pulses, with power that exceeds the critical power for self-focusing, propagating in bulk kerr media. Experiments performed in fused silica and silicon highlight a spontaneous reshaping of the input pulse into a pulsed Bessel beam. A filament is formed in which sub-diffractive propagation is sustained by the Bessel-nature of the pulse.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11571/136394
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