Multifilamentation of femtosecond laser pulses induced by small-scale air turbulence

We report on experimental and numerical investigations of femtosecond pulse propagation locally disturbed by the turbulent flow field of a hot-air blower. The experiments show that turbulence may shorten the collapse/filamentation distance and induce the onset of multiple filaments. This is supporte...

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Veröffentlicht in:	Applied physics. B, Lasers and optics Lasers and optics, 2009-07, Vol.96 (1), p.175-183
Hauptverfasser:	Paunescu, G., Spindler, G., Riede, W., Schröder, H., Giesen, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aerodynamics Blowers Computational fluid dynamics Engineering Exact sciences and technology Femtosecond Fluid flow Fundamental areas of phenomenology (including applications) Lasers Optical Devices Optics Photonics Physical Chemistry Physics Physics and Astronomy Quantum Optics Turbulence Turbulent flow Wave optics Wave propagation, transmission and absorption
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Beschreibung
Zusammenfassung:	We report on experimental and numerical investigations of femtosecond pulse propagation locally disturbed by the turbulent flow field of a hot-air blower. The experiments show that turbulence may shorten the collapse/filamentation distance and induce the onset of multiple filaments. This is supported by numerical simulations indicating that the high spatial frequency part of the turbulence spectrum plays a significant role.
ISSN:	0946-2171 1432-0649
DOI:	10.1007/s00340-009-3578-9