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. 1999 Oct;60(4 Pt A):R3505-7.
doi: 10.1103/physreve.60.r3505.

Formation of a conducting channel in air by self-guided femtosecond laser pulses

S Tzortzakis  1 , M A Franco, Y B André, A Chiron, B Lamouroux, B S Prade, A Mysyrowicz
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Formation of a conducting channel in air by self-guided femtosecond laser pulses

S Tzortzakis et al. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Oct.

Abstract

We report a drastic reduction of air resistivity following the passage of a self-guided femtosecond pulse from a Ti:sapphire laser system at 800 nm with energies per pulse between 1 and 14 mJ and a pulse duration of 120 fs. Connected plasma filaments with a length that can exceed 150 cm are created by these pulses. The presence of a conducting plasma channel results from multiphoton ionization of air molecules in the filament core.

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