SINGLY RESONANT, ALL-SOLID-STATE, MODE-LOCKED LIB3O5 OPTICAL PARAMETRIC OSCILLATOR TUNABLE FROM 652 NM TO 2.65 MU-M

We describe a singly resonant mode-locked optical parametric oscillator that is based on temperature-tuned LiB3O5 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-mu-m 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 approximately 664 nm to 2.47-mu-m. Oscillation thresholds of approximately 2.5 GW/cm2 and internal pump depletions of approximately 20% have been measured.