Abstract

We report 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 $775\mathrm{nm}$ pulses. Single, double, and triple pulses at $344\mathrm{nm}$ with subpulses as short as $19\mathrm{fs}$ are explicitly demonstrated. The method can easily be adapted to arbitrarily shaped pulses throughout the $295–370\mathrm{nm}$ range.

© 2006 Optical Society of America

Widely tunable sub-30 fs ultraviolet pulses by chirped sum frequency mixing

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