a Institute for Optical Monitoring, Siberian Branch, Russian Academy of Sciences, Tomsk 634055, Russia Federation; b Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150001, China; c Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150001, China; Department of Applied Physics, Harbin University of Science and Technology, (West Campus), Harbin 150080, China; d Kuban State University, Krasnodar 350040, Russia Federation
Abstract The basic optical property and phase-matching of new mixed AgGaGeS_4 crystal are presented. Frequency conversion, in particular the SHG of 30ns pulses of 9μm emission band of transversely excited atmospheric-pressure (TEA) CO_2 laser, is realized in AgGaGeS_4 for the first time. As high as 0.57% peak power and 0.3% external energy efficiencies, and 0.7mJ harmonic pulse energy are obtained for the 9.55μm emission line at pump intensity of 4% level of the damage threshold.
Received: 09 April 2003
Revised: 13 May 2004
Published: 21 June 2005
(Frequency conversion; harmonic generation, including higher-order harmonic generation)