Optical femtosecond filaments in condensed media

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.043813· OSTI ID:20863976

Skupin, S; Nuter, R; Berge, L ^[1]

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1. Departement de Physique Theorique et Appliquee, CEA-DAM/Ile de France, Boite Postale 12, 91680 Bruyeres-le-Chatel (France)

The self-guiding of femtosecond light pulses in dense materials is investigated both theoretically and numerically for various laser wavelengths. Special attention is paid on chromatic dispersion, plasma gain, and multiphoton absorption in the nonlinear evolution of ultrashort filaments. First, by mapping the dispersion versus the ratio of beam power over the critical power for self-focusing we justify the existence of special propagation regimes, in which the beam self-channels with weak plasma response. Second, we prove that at low wavelengths multiphoton losses can quench the emission of free electrons, which justifies recent experimental observations of no apparent electron emission in water.

• OSTI ID: 20863976
• Journal Information: Physical Review. A, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevA.74.043813; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ELECTRON EMISSION
ELECTRONS
EVOLUTION
FILAMENTS
FOCUSING
GAIN
LASER RADIATION
LIGHT TRANSMISSION
LOSSES
MAPPING
MULTI-PHOTON PROCESSES
NONLINEAR PROBLEMS
PLASMA
PULSES
VISIBLE RADIATION
WATER
WAVELENGTHS