QUADRUPLY RESONANT OPTICAL PARAMETRIC OSCILLATION IN A MONOLITHIC TOTAL-INTERNAL-REFLECTION RESONATOR

Monolithic total-internal-reflection resonators are low-loss broadband devices that permit variable input-output coupling. They are ideally suited as resonators for high-efficiency low-threshold widely tunable continuous-wave optical parametric oscillation. We demonstrate a continuous-wave quadruply resonant MgO:LiNbO3 optical parametric oscillator in which doubly resonant second-harmonic generation and doubly resonant optical parametric oscillation occur simultaneously. The threshold subharmonic power at 1.06 mum for oscillation near 1.06 mum is 0.4 mW. Stable single-frequency operation is achieved, and the tuning curve is measured.