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Proceedings Paper

High-intensity high-order harmonic generation for attosecond autocorrelation measurements
Author(s): T. Ozaki; H. C. Bandulet; S. Fourmaux; J. C. Kieffer; R. A. Ganeev; H. Kuroda
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Paper Abstract

We demonstrate two methods of high-order harmonic generation, which has the potential of generating high-order harmonics with high intensities. The first method is solid surface harmonics. Using the second harmonic output of the 10 TW, 60 fs Ti:sapphire laser system at the INRS, we have observed multiple soft x-ray harmonics of the 397 nm pump laser. The highest order (23rd harmonic at 17.3 nm) observed in our experiments are limited by the 17 nm absorption edge of the thick 1.6 μm Al foil, which is used to eliminate the high intensity pump laser. The second method is harmonics from an ablation plume generated using a relatively low intensity prepulse. We demonstrate the generation of up to the 63rd harmonics (λ=12.6 nm) of a Ti:sapphire laser pulse (150 fs, 10 mJ), using pre-pulse (210 ps, 24 mJ) produced boron plasma as the nonlinear medium. The influence of various parameters on the harmonic conversion efficiency was analyzed. Typical conversion efficiencies were evaluated to be between 10-4 (for third harmonic) and 10-7 (within the plateau range).

Paper Details

Date Published: 21 September 2005
PDF: 8 pages
Proc. SPIE 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications, 592006 (21 September 2005); doi: 10.1117/12.619325
Show Author Affiliations
T. Ozaki, Univ. du Quebec (Canada)
H. C. Bandulet, Univ. du Quebec (Canada)
S. Fourmaux, Univ. du Quebec (Canada)
J. C. Kieffer, Univ. du Quebec (Canada)
R. A. Ganeev, Univ. of Tokyo (Japan)
H. Kuroda, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5920:
Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications
Zenghu Chang; Stuart Kleinfelder; Dennis L. Paisley; Jean-Claude Kieffer; Jerome B. Hastings, Editor(s)

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