Abstract
Second-harmonic output at 4.6–5.5 µm of the order of 6 m W with a 0.12% external conversion efficiency has been obtained by pumping a AgGaSe2 crystal with a low-power cw CO2 laser. The surface damage threshold of AgGaSe2 for cw radiation was found to be inside the limit of 33–45 kW/cm2 in the 9.2–10.8-µm wavelength region. Another important limitation of the pump power connected with a thermal lensing effect in crystal was determined experimentally. A comparison was made of AgGaSe2 and ZnGeP2 crystals as materials suitable for the efficient generation of the second harmonic of cw CO2 laser radiation.
© 1997 Optical Society of America
Full Article | PDF ArticleMore Like This
K. Stoll, J.-J. Zondy, and O. Acef
Opt. Lett. 22(17) 1302-1304 (1997)
Kiyoshi Kato
Appl. Opt. 36(12) 2506-2510 (1997)
Yi Jiang and Yujie J. Ding
Opt. Express 15(20) 12699-12707 (2007)