Propagation of fs TW laser filaments in adverse atmospheric conditions

Propagation of fs TW laser filaments in adverse atmospheric conditions

The propagation of femtosecond terawatt laser pulses at reduced pressure (0.7 atm) is investigated experimentally. In such conditions, the non-linear refractive index n 2 is reduced by 30%, resulting in a slightly farther filamentation onset and a reduction of the filament number. However, the filam...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2005-06, Vol.80 (7), p.785-789
Hauptverfasser: MECHAIN, G, MEJEAN, G, WINN, W, SCHLIE, L. A, MYSYROWICZ, A, SAUERBREY, R, WÖSTE, L, WOLF, J.-P, ACKERMANN, R, ROHWETTER, P, ANDRE, Y.-B, KASPARIAN, J, PRADE, B, STELMASZCZYK, K, YU, J, SALMON, E
Format: Artikel
Sprache:eng
Schlagworte:
Beam trapping, self-focusing and defocusing
self-phase modulation
Beam trapping, self-focusing, and thermal blooming
Earth, ocean, space
Effects of clouds and water
Exact sciences and technology
External geophysics
Femtosecond
Filaments
Forming
Fundamental areas of phenomenology (including applications)
Lasers
Meteorology
Nonlinear optics
Nonlinearity
Optics
Physics
Propagation
Refractive index
Refractivity
Water in the atmosphere (humidity, clouds, evaporation, precipitation)
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Beschreibung
Zusammenfassung:The propagation of femtosecond terawatt laser pulses at reduced pressure (0.7 atm) is investigated experimentally. In such conditions, the non-linear refractive index n 2 is reduced by 30%, resulting in a slightly farther filamentation onset and a reduction of the filament number. However, the filamentation process, especially the filament length, is not qualitatively affected. We also show that drizzle does not prevent the filaments from forming and propagating.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-005-1825-2