Title :
Supercontinuum generation of femtosecond filaments at different laser wavelengths in air
Author :
Bergé, Luc ; Skupin, Stefan
Author_Institution :
CEA/DAM, Bruyeres-le-Chatel
Abstract :
This study analyzes numerically supercontinuum generation for the three laser wavelengths of 248 nm, 800 nm and 1550 nm, on the basis of different nonlinear Schrodinger-like equations for the electric field envelope involving or not space-time focusing and self-steepening operators. A numerical analysis of the unidirectional propagation equation is also performed, avoiding any Taylor expansion of the dispersion relation. Several photo-ionization models, fixing the level of the filament intensity in the range of 10 to 100 TW/cm2, are investigated. Finally, emphasis is given on long-range propagation over several meters in air.
Keywords :
Schrodinger equation; high-speed optical techniques; nonlinear differential equations; photoionisation; plasma light propagation; plasma production by laser; supercontinuum generation; dispersion relation; electric field envelope; femtosecond filaments; filament intensity; laser wavelengths; long-range propagation; nonlinear Schrodinger-like equations; photoionization models; self-steepening operators; space-time focusing; supercontinuum generation; unidirectional propagation equation; wavelength 1550 nm; wavelength 248 nm; wavelength 800 nm; Dielectric liquids; Differential equations; Nonlinear equations; Optical propagation; Optical pulse generation; Plasmas; Power generation; Pulse generation; Scanning probe microscopy; Supercontinuum generation;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386117
