Cumulative air density depletion during high repetition rate filamentation of femtosecond laser pulses: Application to electric discharge triggering - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2021

Cumulative air density depletion during high repetition rate filamentation of femtosecond laser pulses: Application to electric discharge triggering

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1
Pierre Walch
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Benoît Mahieu
Leonid Arantchouk
Yves-Bernard André
André Mysyrowicz
Aurélien Houard

Abstract

We study the influence of the laser repetition rate on the generation of low-density channels of air left in the path of femtosecond laser filament. At high repetition rates, we observe the formation of a permanent millimeter-wide low-density channel that exceeds the depth and width of the transient depletion due to a single filament. We also show that this permanent cumulative effect decreases the breakdown voltage between two electrodes and can alter the path of the discharge. By comparing this effect in air and in pure nitrogen, we show that an accumulation of O−2 ions contributes to the reduction in the breakdown voltage.
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Origin : Publication funded by an institution

Dates and versions

hal-03510763 , version 1 (04-01-2022)

Licence

Attribution - CC BY 4.0

Identifiers

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Pierre Walch, Benoît Mahieu, Leonid Arantchouk, Yves-Bernard André, André Mysyrowicz, et al.. Cumulative air density depletion during high repetition rate filamentation of femtosecond laser pulses: Application to electric discharge triggering. Applied Physics Letters, 2021, 119 (26), pp.262101. ⟨10.1063/5.0077635⟩. ⟨hal-03510763⟩
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