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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 1 — Jan. 2, 2012
  • pp: 90–100

Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti:sapphire laser pulses

R. A. Ganeev, C. Hutchison, A. Zaïr, T. Witting, F. Frank, W. A. Okell, J. W. G. Tisch, and J. P. Marangos  »View Author Affiliations


Optics Express, Vol. 20, Issue 1, pp. 90-100 (2012)
http://dx.doi.org/10.1364/OE.20.000090


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Abstract

We have investigated resonance effects in high-order harmonic generation (HHG) within laser-produced plasmas. We demonstrate a significantly improved harmonic yield by using two-color pump-induced enhancement and a 1 kHz pulse repetition rate. Together with an increased HHG output, the even harmonics in the cutoff region were enhanced with respect to odd harmonics. We report the observation of a resonance-induced growth in intensity of 20th harmonic in silver plasma (2×), 26th harmonic in vanadium plasma (4×), and 28th harmonic in chromium plasma (5×).

© 2011 OSA

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4160) Nonlinear optics : Multiharmonic generation

ToC Category:
Nonlinear Optics

History
Original Manuscript: October 21, 2011
Revised Manuscript: November 21, 2011
Manuscript Accepted: November 21, 2011
Published: December 19, 2011

Citation
R. A. Ganeev, C. Hutchison, A. Zaïr, T. Witting, F. Frank, W. A. Okell, J. W. G. Tisch, and J. P. Marangos, "Enhancement of high harmonics from plasmas using two-color pump and chirp variation of 1 kHz Ti:sapphire laser pulses," Opt. Express 20, 90-100 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-1-90


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