Journal
OPTICS LETTERS
Volume 33, Issue 4, Pages 345-347Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.000345
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- ICREA Funding Source: Custom
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We report efficient generation of tunable femtosecond pulses in the ultraviolet (UV) by intracavity doubling of a visible femtosecond optical parametric oscillator (OPO). The OPO, based on a 400 mu m BiB3O6 crystal and pumped at 415 nm in the blue, can provide visible femtosecond signal pulses across 500-710 nm. Using a 500 mu m crystal of beta-BaB2O4 internal to the OPO cavity, efficient frequency doubling of the signal pulses into the UV is achieved, providing tunable femtosecond pulses across 250-355 nm with up to 225 mW of average power at 76 MHz. Cross-correlation measurements result in UV pulses with durations down to 132 fs for 180 fs blue pump pulses. (c) 2008 Optical Society of America.
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