An optical parametric generator based on periodically poled LiNbO<sub>3</sub> and pumped by a 2.051-μm-wavelength laser has been demonstrated. Pump pulses of 50-ns duration of 50-Hz repetition frequency were converted into signal and idler pulses in the 3.4–5.2-μm wavelength range in a double-pass pump configuration by a 5-cm-long quasi-phase-matched crystal. An average pump power of 180 mW generated 30-mW average signal power at 3.64-μm wavelength, corresponding to 16.7% signal conversion efficiency.
© 2000 Optical Society of America
(160.3730) Materials : Lithium niobate
(190.0190) Nonlinear optics : Nonlinear optics
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
Göran Hansson and Duane D. Smith, "Optical parametric generation in 2-μm-wavelength-pumped periodically poled LiNbO3," Opt. Lett. 25, 1783-1785 (2000)