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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 19, Iss. 7 — Jul. 1, 2002
  • pp: 1611–1619

Off-axially phase-matched high-order harmonic generation in an extended medium

Viktor T. Platonenko, Vasily V. Strelkov, and Gaetano Ferrante  »View Author Affiliations

JOSA B, Vol. 19, Issue 7, pp. 1611-1619 (2002)

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We investigate theoretically high-order harmonic generation in gases and show that, if the target thickness is high, off-axial phase matching is of importance. Results of a numerical study of harmonic generation that takes into account the self-action of the laser pulse are presented. We show that self-guiding of the laser pulse in a noble gas makes possible off-axially phase-matched high harmonic generation if some easily ionizable gas is added to the main generating gas. In calculations for such mixtures we obtained conversion efficiencies as great as approximately 10<sup>−3</sup>–10<sup>−2</sup> for the 33rd harmonic of a Ti:sapphire laser and approximately 10<sup>−4</sup> for the 121st harmonic.

© 2002 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.4180) Nonlinear optics : Multiphoton processes
(190.5940) Nonlinear optics : Self-action effects
(260.5950) Physical optics : Self-focusing
(320.2250) Ultrafast optics : Femtosecond phenomena

Viktor T. Platonenko, Vasily V. Strelkov, and Gaetano Ferrante, "Off-axially phase-matched high-order harmonic generation in an extended medium," J. Opt. Soc. Am. B 19, 1611-1619 (2002)

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