Abstract

We experimentally demonstrate efficient tunable upconversion by cascading optical oscillation and wideband adiabatic sum-frequency generation in a single KTiOPO4 crystal, yielding red light tunable over a 6.2 nm wavelength band. The conversion efficiency of the 1064 nm pump to the red output was up to 4.7%, and with the highest pump power of 1.5 W we obtained 71 mW of average power at 637 nm.

© 2010 Optical Society of America

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