Conical-emission and shock-front dynamics in femtosecond laser-pulse filamentation

We investigate both experimentally and numerically the space-time dynamics of an ultrashort laser pulse during self-focusing and nonlinear propagation in water by means of a time-gated angular-spectrum characterization. The results identify the formation of shock fronts on both trailing and leading...

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Bibliographic Details
Published in:	Physical review. A, Atomic, molecular, and optical physics Vol. 76; no. 2
Main Authors:	Bragheri, F., Faccio, D., Couairon, A., Matijosius, A., Tamošauskas, G., Varanavičius, A., Degiorgio, V., Piskarskas, A., Di Trapani, P.
Format:	Journal Article
Language:	English
Published:	United States 01-08-2007
Subjects:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS EMISSION FOCUSING KERR EFFECT LASER RADIATION NONLINEAR PROBLEMS PEAKS PULSES SPACE-TIME SPECTRA TIME RESOLUTION VELOCITY WATER WAVE PACKETS WAVE PROPAGATION
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Summary:	We investigate both experimentally and numerically the space-time dynamics of an ultrashort laser pulse during self-focusing and nonlinear propagation in water by means of a time-gated angular-spectrum characterization. The results identify the formation of shock fronts on both trailing and leading edges of the wave packet that are due to the formation of subluminal and superluminal group velocity intensity peaks, sustained by conical emission.
ISSN:	1050-2947 1094-1622
DOI:	10.1103/PhysRevA.76.025801