We demonstrate a high-efficiency ZnGeP2 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
Original Manuscript: April 23, 1998
Revised Manuscript: August 25, 1998
Published: January 20, 1999
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)