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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 19, Iss. 11 — Nov. 1, 2002
  • pp: 2603–2608

Influence of the pedestal on the interaction of a high-intensity, ultrashort laser pulse with a gas target

Pascal D’Oliveira, Sandrine Dobosz, Sébastien Hulin, Pascal Monot, Fabrice Réau, and Thierry Auguste  »View Author Affiliations


JOSA B, Vol. 19, Issue 11, pp. 2603-2608 (2002)
http://dx.doi.org/10.1364/JOSAB.19.002603


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Abstract

We report a study on the influence of the pedestal in laser–gas jet interaction experiments at very high intensity. The dynamic of the plasma resulting from the interaction is probed on a 3.8-ns time scale with a 60-fs time and a 5-µm space resolution using a Mach–Zehnder interferometer. It is observed that a plasma is created by the amplified spontaneous emission pedestal before the ultrashort pulse reaches the jet. We show that this preplasma modifies dramatically the propagation of the laser beam, which splits into two parts when it reaches the preplasma. The major part of the beam is strongly refracted by the preplasma while a small fraction is guided in the channel resulting from the hydrodynamic expansion of the preplasma.

© 2002 Optical Society of America

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(350.5400) Other areas of optics : Plasmas
(350.5500) Other areas of optics : Propagation

Citation
Pascal D’Oliveira, Sandrine Dobosz, Sébastien Hulin, Pascal Monot, Fabrice Réau, and Thierry Auguste, "Influence of the pedestal on the interaction of a high-intensity, ultrashort laser pulse with a gas target," J. Opt. Soc. Am. B 19, 2603-2608 (2002)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-19-11-2603

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