Efficient monolithic MgO:LiNbO(3) singly resonant optical parametric oscillator.

We have operated a monolithic MgO:LiNbO(3) singly resonant optical parametric oscillator (OPO) as both a standing-wave and a ring-geometry resonator. The OPO was pumped by the second harmonic of an amplified single-mode diode-laser-pumped Nd:YAG laser. Pump depletions of greater than 60% were observed when pumping four times greater than the 35-W threshold. The OPO output at the resonant signal tuned with temperature from 834 to 958 nm, while the corresponding idler tuned from 1.47 to 1.2 microm. The spectral characteristics of the OPO signal output and the relative merits of a standing wave versus a ring geometry are discussed.