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Temporal and Angular Resolution of the Ionization-Induced Refraction of a Short Laser Pulse in Helium Gas

Abstract : The refraction of a short and intense laser pulse focused in helium gas has been studied both experimentally and numerically. Using the time-frequency correspondence of a 120 fs laser pulse linearly chirped to 1.8 ps, the ionization-induced refraction is resolved both temporally and angularly. Two-dimensional numerical simulations are performed to calculate the laser propagation, from the focusing lens to the detector. With such a simulation, we get a quantitative agreement with the experiment, both for the refraction of the chirped pulse and for the ionization-induced blueshifted spectrum of the compressed pulse.
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https://hal.archives-ouvertes.fr/hal-01165244
Contributor : Victor Malka <>
Submitted on : Thursday, June 18, 2015 - 4:34:55 PM
Last modification on : Thursday, March 5, 2020 - 6:30:56 PM

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P. Chessa, E. de Wispelaere, F. Dorchies, Victor Malka, J. R. Marquès, et al.. Temporal and Angular Resolution of the Ionization-Induced Refraction of a Short Laser Pulse in Helium Gas. Physical Review Letters, American Physical Society, 1999, 82 (3), pp.552. ⟨10.1103/PhysRevLett.82.552⟩. ⟨hal-01165244⟩

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