A detailed investigation of frequency doubling of a transversely excited atmospheric CO2 laser operating at 9.55 µm with a CdGeAs2 crystal was carried out. The temperature of the crystal was varied between 80 and 295 K to maximize the frequency-doubled energy. The temporal shape of the generated beam at 4.775 µm was monitored to calculate its peak power. High values of midwave infrared pulse energy (16.65 mJ) and peak power (92 kW) were obtained, which can be of potential use in lidar systems.
© 2002 Optical Society of America
Original Manuscript: August 17, 2001
Revised Manuscript: December 18, 2001
Published: April 20, 2002
Andrew Zakel, James L. Blackshire, Peter G. Schunemann, Scott D. Setzler, Jonathan Goldstein, and Shekhar Guha, "Temperature and pulse-duration dependence of second-harmonic generation in CdGeAs2," Appl. Opt. 41, 2299-2303 (2002)