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7 April 2004 Frequency doubling of focused ultrashort pulses under conditions of significant temporal walk-off
Solomon M. Saltiel, Kaloyan Koynov, B. Agate, Wilson Sibbett
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Proceedings Volume 5478, Laser Optics 2003: Solid State Lasers and Nonlinear Frequency Conversion; (2004) https://doi.org/10.1117/12.560956
Event: Laser Optics 2003, 2003, St. Petersburg, Russian Federation
Abstract
A theoretical model that describes second harmonic generation of focused ultrashort pulses in the presence of large group velocity mismatch (GVM) is presented. We observe a direct dependence of the optimal focusing on the strength of GVM. Our model also describes the temporal duration of the second harmonic pulsed under these conditions as well as the change in optimal phase mismatch. The theoretical results are compared with an experiment for second harmonic generation with focused femtosecond pulses in a “thick” crystal of KNbO3 with a length much bigger than the time duration-GVM ratio.
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Solomon M. Saltiel, Kaloyan Koynov, B. Agate, and Wilson Sibbett "Frequency doubling of focused ultrashort pulses under conditions of significant temporal walk-off", Proc. SPIE 5478, Laser Optics 2003: Solid State Lasers and Nonlinear Frequency Conversion, (7 April 2004); https://doi.org/10.1117/12.560956
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KEYWORDS
Ultrafast phenomena
Second-harmonic generation
Harmonic generation
Crystals
Femtosecond phenomena
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