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 (10111012 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)|
|Title:||Femtosecond-terawatt laser pulses in air: Formation of multiple filaments|
|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|
|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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