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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 7722–7732

Quasi-phase-matched high-order harmonic generation using tunable pulse trains

Kevin O’Keeffe, David T. Lloyd, and Simon M. Hooker  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 7722-7732 (2014)

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A simple technique for generating trains of ultrafast pulses is demonstrated in which the linear separation between pulses can be varied continuously over a wide range. These pulse trains are used to achieve tunable quasi-phase-matching of high harmonic generation over a range of harmonic orders up to the harmonic cut-off, resulting in enhancements of the harmonic intensity in excess of an order of magnitude. The peak enhancement of the harmonics is clearly shown to depend on the separation between pulses, as well as the number of pulses in the train, representing an easily tunable source of quasi-phase-matched high harmonic generation.

© 2014 Optical Society of America

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(320.5550) Ultrafast optics : Pulses
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)

ToC Category:
Nonlinear Optics

Original Manuscript: January 31, 2014
Revised Manuscript: March 14, 2014
Manuscript Accepted: March 17, 2014
Published: March 26, 2014

Kevin O’Keeffe, David T. Lloyd, and Simon M. Hooker, "Quasi-phase-matched high-order harmonic generation using tunable pulse trains," Opt. Express 22, 7722-7732 (2014)

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