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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
Ultrashort laser pulse filamentation from spontaneous X-Wave formation in air
Daniele Faccio1, Alessandro Averchi, Antonio Lotti
1CNISM and Department of Physics and Mathematics, Università dell'Insubria, Via Valleggio 11, IT-22100 Como, Italy. daniele.faccio@uninsubria.it
Optics Express
|June 11, 2008
Abstract:
The description of ultrashort laser pulse filamentation in condensed media as a spontaneous formation of X waves is shown to apply also to filaments generated in air. Within this framework, a simple explanation is brought for several features of the filament such as the subdiffractive propagation and the energy flux from the weakly localized tails of the X-waves to the intense core.

