We demonstrate a high-efficiency ZnGeP<sub>2</sub> optical parametric oscillator (OPO) pumped by another KTP OPO in a multimode-pumped tandem OPO configuration. The maximum optical-to-optical and slope efficiencies were 32% and 42.5%, respectively. Our setup also provides tunable multiband radiation in the 2.03–2.32-μm range and the 2.9–6.2-μm range simultaneously.
© 1999 Optical Society of America
Poh Boon Phua, Kin Seng Lai, Rui Fen Wu, and Tow Chong Chong, "High-Efficiency Mid-Infrared ZnGeP2 Optical Parametric Oscillator in a Multimode-Pumped Tandem Optical Parametric Oscillator," Appl. Opt. 38, 563-565 (1999)