Abstract
Filamentation of femtosecond laser beams have attracted intense interest due to possible applications for lightning protection, atmospheric remote sensing, terahertz (THz) generation, etc [1]. Properties of the plasma filaments have been studied in numerous publications. Of primary interest among them are the plasma density in a filament and its decay. Filaments were generally studied in ambient air, whereas filament plasma density decay in other gases and at different pressures has not been investigated yet. In this work, we considered plasma filament decay in air, N2 and Ar for pressure range 1-760 Torr.
© 2013 IEEE
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