Singly resonant, all-solid-state, mode-locked LiB(3)O(5) optical parametric oscillator tunable from 652 nm to 2.65 microm.

We describe a singly resonant mode-locked optical parametric oscillator that is based on temperature-tuned LiB(3)O(5) and synchronously pumped by a frequency-doubled, mode-locked, Q-switched, diode-laser-pumped Nd:YLF laser at 523.5 nm. The oscillator is broadly tunable throughout the range of 652 nm to 2.65 microm and can simultaneously generate two pairs of signal and idler beams, leading to four-color operation of the device over an extensive wavelength range from ~664 nm to 2.47 microm. Oscillation thresholds of ~2.5 GW/cm(2) and internal pump depletions of ~20% have been measured.