Pulse width measurement of high-order harmonics by autocorrelation
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Pulse widths of the 7th and 9th harmonics of a Ti:sapphire (TiS) laser have been measured by an autocorrelation technique using two-photon and three-photon ionization of He and Ar as nonlinear phenomena. The pulse widths of the 7th and 9th harmonics were 47 fs and 27 fs, respectively, where the pulse width of the fundamental pulse was 34 fs. The pulse width of the 9th harmonic depends strongly on the peak intensity of the fundamental pulse. These results can be explained by quantum theory by taking into account the temporal and spatial distribution of the fundamental beam.
- Pulse width measurement of high-order harmonics by autocorrelation
Applied Physics B
Volume 70, Issue 3 , pp 389-394
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- PACS: 32.80.Rm; 42.65.Ky
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