Multiple filamentation of terawatt laser pulses in air

The filamentation of femtosecond light pulses in air is numerically and experimentally investigated for beam powers reaching several TW. Beam propagation is shown to be driven by the interplay between intense, robust spikes created by the defects of the input beam and random nucleation of light cell...

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Veröffentlicht in:	Physical review letters 2004-06, Vol.92 (22), p.225002.1-225002.4, Article 225002
Hauptverfasser:	BERGE, L, SKUPIN, S, BOURAYOU, R, SAUERBREY, R, LEDERER, F, MEJEAN, G, YU, J, KASPARIAN, J, SALMON, E, WOLF, J. P, RODRIGUEZ, M, WÖSTE, L
Format:	Artikel
Sprache:	eng
Schlagworte:	Beam characteristics: profile, intensity, and power spatial pattern formation Earth, ocean, space Exact sciences and technology External geophysics Fundamental areas of phenomenology (including applications) Interaction of atmosphere with electromagnetic waves propagation Laser optical systems: design and operation Laser-plasma interactions Meteorology Nonlinear optics Optical solitons nonlinear guided waves Optics Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Propagation, transmission, attenuation, and radiative transfer
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Beschreibung
Zusammenfassung:	The filamentation of femtosecond light pulses in air is numerically and experimentally investigated for beam powers reaching several TW. Beam propagation is shown to be driven by the interplay between intense, robust spikes created by the defects of the input beam and random nucleation of light cells. Evolution of the filament patterns can be qualitatively reproduced by an averaged-in-time (2D+1)-dimensional model derived from the propagation equations for ultrashort pulses.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.92.225002