A wavelength-agile mid-infrared (IR) ZnGeP2 (ZGP) optical parametric oscillator (OPO) using a galvano-controlled double-crystal KTiOPO4 (KTP) OPO was demonstrated. The mid-IR wavelength was tuned by varying the KTP OPO pump wavelength while the ZGP crystal angle remained fixed. Rapid tuning of the KTP OPO was achieved by changing the crystal angle by using the galvano scanner. Our mid-IR source can jump to a different wavelength without scanning through the intermediate wavelengths while also permitting continuous-wavelength scanning. The mid-IR source can be tuned from approximately 5to10 μm at a phase-matching angle of 51°, while the pump wavelength is controlled in the 1.95-2.2 μm range.
© 2007 Optical Society of America
Original Manuscript: October 2, 2006
Revised Manuscript: November 6, 2006
Manuscript Accepted: November 7, 2006
Published: January 12, 2007
Katsuhiko Miyamoto and Hiromasa Ito, "Wavelength-agile mid-infrared (5-10 μm) generation using a galvano-controlled KTiOPO4 optical parametric oscillator," Opt. Lett. 32, 274-276 (2007)