Applied Sciences | Free Full-Text | Two-Color Quantum Correlation between Down-Conversion Beams at 1.5 and 3.3 μm from a Singly Resonant Optical Parametric Oscillator
APE OPO Optical Parametric Oscillator Controller | eBay
Optical parametric oscillators, explained by RP Photonics Encyclopedia; OPO, nonlinear frequency conversion, types, pumping, applications
Tuning and stability of a singly resonant continuous-wave optical parametric oscillator close to degeneracy
Paper: 2016 Single-step sub-200 fs mid-infrared generation from an optical parametric oscillator synchronously pumped by an erbium fiber laser | Raschke Nano-Optics Group
Optical Parametric Oscillators: Novel tunable lasers enable new nanoimaging techniques | Laser Focus World