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"19 femtosecond shaped ultraviolet pulses" C. Schriever, S. Lochbrunner, M. Opitz, and E. RiedleOpt. Lett. 31, 543 - 545 (2006) Abstract: We report on the generation of shaped tunable ultrashort ultraviolet pulses with full control over the spectral phase and amplitude. The output of a noncollinearly phase matched optical parametric amplifier is shaped in phase and amplitude by a liquid crystal spatial light modulator. The resulting structured visible pulses are transferred into the ultraviolet by sum frequency mixing with strongly chirped 775 nm pulses. Single, double and triple pulses at 344 nm with subpulses as short as 19 femtoseconds are explicitly demonstrated. The method can easily be adapted to arbitrarily shaped pulses throughout the 295 to 370 nm range. BMO authors (in alphabetic order): Stefan Lochbrunner Michael Opitz Eberhard Riedle Christian Schriever |