Abstract.
We present energy-resolved cross-correlation measurements of extreme ultraviolet (XUV) pulses generated as high harmonics of femtosecond pulses from a 1 kHz titanium-sapphire laser. The harmonic pulses are probed by a fraction of the fundamental laser pulse at 800 nm, in a noncollinear geometry, allowing us to vary independently the parameters of the harmonic pump and near-infrared probe pulses. We measure the so-called “sidebands” in the photoelectron spectrum of argon corresponding to the absorption of a harmonic photon plus or minus one probe photon. Spectrally resolving the cross-correlation signal allows us to characterize the time-dependent frequency of the XUV pulse.
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Received: 20 December 2002, Published online: 24 April 2003
PACS:
42.65.Ky Harmonic generation, frequency conversion
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López-Martens, R., Mauritsson, J., Johansson, A. et al. Time-frequency characterization of high-order harmonic pulses. Eur. Phys. J. D 26, 105–109 (2003). https://doi.org/10.1140/epjd/e2003-00085-9
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DOI: https://doi.org/10.1140/epjd/e2003-00085-9