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

Stellios Tzortzakis 1 Michel Franco 1 Yves-Bernard André 1 Arnaud Chiron 1 Brigitte Lamouroux 1 Bernard Prade 1 André Mysyrowicz 1
1 LOA - Laboratoire d'optique appliquée
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.
Keywords : filamentation plasma nonlinear optics
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https://hal-polytechnique.archives-ouvertes.fr/hal-00465591
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Submitted on : Friday, March 19, 2010 - 10:48:24 PM
Last modification on : Tuesday, April 21, 2020 - 10:29:58 AM

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Stellios Tzortzakis, Michel Franco, Yves-Bernard André, Arnaud Chiron, Brigitte Lamouroux, et al.. Formation of a conducting channel in air by self-guided femtosecond laser pulses. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 1999, 60 (4), pp.R3505-R3507. ⟨10.1103/PhysRevE.60.R3505⟩. ⟨hal-00465591⟩

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