We describe a Ti:sapphire-pumped picosecond optical parametric oscillator based on periodically poled RbTiOAsO<sub>4</sub> that is broadly tunable in the near to mid infrared. A 4.5-mm single-grating crystal at room temperature in combination with pump wavelength tuning provided access to a continuous-tuning range from 3.35 to 5µm , and a pump power threshold of 90 mW was measured. Average mid-infrared output powers in excess of 100 mW and total output powers of 400 mW in ~1-ps pulses were obtained at 33% extraction efficiency.
© 1998 Optical Society ofAmerica
G. T. Kennedy, D. T. Reid, A. Miller, M. Ebrahimzadeh, H. Karlsson, G. Arvidsson, and F. Laurell, "Near- to mid-infrared picosecond optical parametric oscillator based on periodically poled RbTiOAsO4," Opt. Lett. 23, 503-505 (1998)