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Schriever, Christian, Opitz, M., Moschüring, L., Riedle, Eberhard ORCID logoORCID: https://orcid.org/0000-0002-2672-5718 and Lochbrunner, Stefan (2006): Shaped tunable pulses in the UV with 20 fs sub-structures. Conference on Lasers and Electro-Optics Europe, 2005, 12-17 June 2005, Munich, Germany.

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The visible sub-20 fs pulses of a noncollinear optical parametric amplifier (NOPA) are shaped with a LCD mask in a 4f setup and converted to the UV by sum frequency mixing with stretched NIR pulses from a Ti:sapphire amplifier system. To characterize the temporal shape of the resulting UV pulses, cross correlations are measured by difference frequency generation with 20 fs pulses at 700 nm generated by a second NOPA. The achieved pulse lengths are well below vibrational periods of molecular skeletal motions while the intervals in such a pulse train can be adopted to a vibrational frequency.

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