A low-threshold (350-mW) stable single-frequency continuous-wave optical parametric oscillator was demonstrated. Tunable idler output up to 450 mW was obtained near 3 μm by resonating both the signal wave and a single-frequency 1.06-μm Nd: YAG pump laser in a periodically poled lithium niobate optical-parametric-oscillator ring resonator. Tunable output wavelengths from 2.9 μm to 3.25 μm were also demonstrated. By inserting an etalon, we achieved an absolute midinfrared single-frequency stability of +/-0.01 nm.
© 1998 Optical Society of AmericaFull Article | PDF Article