We report a femtosecond optical parametric oscillator based on a periodically poled KTiOPO4 crystal for which quasi-phase matching is achieved with a 24-µm poling period. The singly resonant parametric oscillator, synchronously pumped by a Ti:sapphire laser at a wavelength of 758 nm, generates a signal at 1200 nm and an idler at 2060 nm. The maximum signal power conversion efficiency of the device is 22% with a pump depletion of 69%. We tune the signal wavelength over a 200-nm band by changing the cavity length. In addition, pump wavelength tuning provides output tunability in the 1000–1235-nm range.
© 1998 Optical Society of America
Tolga Kartaloğlu, Kahraman G. Köprülü, Orhan Aytür, Michael Sundheimer, and William P. Risk, "Femtosecond optical parametric oscillator based on periodically poled KTiOPO4," Opt. Lett. 23, 61-63 (1998)