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Femtosecond-terawatt laser pulses in air: Formation of multiple filaments

Eckel, Hans-Albert and Spindler, G. (2004) Femtosecond-terawatt laser pulses in air: Formation of multiple filaments. NATO SET/TG 31 final meeting, Paris, 13.-14.12.2004.

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A theoretical investigation of ultrashort pulse propagation in various transparent media has been carried out. It is based on the numerical solution of the optical wave equation, taking into account nonlinear effects, leading to a nonlinear Schrödinger equation in dimensionless variables. In particular the multiple filament formation is calculated using a plane wave linear perturbation model in a medium free of dispersion. The results show a new propagation regime: the breakup of an ultrashort laser beam, beyond 50 – 100 “critical powers”, into multiple filaments at relative low peak intensities in the filaments (1011–1012 W/cm^2) and, hence, minor plasma generation. The numerical simulations are in good agreement with experimental measurements.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Femtosecond-terawatt laser pulses in air: Formation of multiple filaments
AuthorsInstitution or Email of Authors
Eckel, Hans-AlbertUNSPECIFIED
Keywords:ultrashort pulse, filament formation
Event Title:NATO SET/TG 31 final meeting, Paris, 13.-14.12.2004
HGF - Research field:Energy
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Energy
DLR - Program:L - no assignement
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Hans-Albert Eckel
Deposited On:16 Sep 2005
Last Modified:27 Apr 2010 13:01

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