Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 80, Issue 7, Pages 785-789Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-005-1825-2
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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.
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