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Journal Articles Optics Express Year : 2022

Characteristics of femtosecond laser-induced shockwaves in air

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Abstract

Dynamic characteristics of femtosecond laser-generated shockwaves are investigated in ambient air. The experiments are performed using a 360-fs pulsed laser at a wavelength of 1.03 µm, with laser intensities up to 5 × 10 14 W/cm 2 (corresponding to about five times the air breakdown intensity threshold). Plasma and shockwave generation and propagation are visualized using a time-resolved transmission microscope. The maximum propagation velocity is in the order of Mach 30. By implementing a simple theoretical model, we find an initial pressure loading in the GPa range and shockwave pressure dropping down to MPa following propagation over few micrometers away from focus.
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Dates and versions

hal-03851495 , version 1 (20-01-2023)

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Olga Koritsoglou, Didier Loison, Olivier Uteza, Alexandros Mouskeftaras. Characteristics of femtosecond laser-induced shockwaves in air. Optics Express, 2022, 30 (21), pp.37407. ⟨10.1364/OE.468224⟩. ⟨hal-03851495⟩
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