Vol. 17, issue 02-03, article # 6

Andreev Yu. M., Badikov V. V., Geiko P. P., Grechin S. G., Efimenko V. V., Efimenko T. D., Panyutin V. L., Tikhomirov A. A., Shaiduko A. V. Second harmonic generation of TEA CO2 laser radiation in LiInSe2 . // Atmospheric and oceanic optics. 2004. V. 17. No. 02-03. P. 115-120. PDF
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The optical properties, damage threshold, and thermal conductivity of a new nonlinear LiInSe2 crystal of the mm2 point symmetry group have been investigated. The transparency range of a red colored crystal is 0.4-13.5 mm at the zero level. The damage level is 248 ± 16 MW/cm2 at 30 ns pulsed ТЕА СО2 laser pump, that is, 1.7 times as high as that of ZnGeP2. The thermal conductivity is 0.014 ± 0.002 W/cm2 K. Second harmonic generation was obtained for the first time for the ТЕА СО2 laser. The energy conversion efficiency for the 9.55 mm emission line was 1.5% in energy and 2.6% in peak power at the pump intensity of 38.5 MW/cm2, and that for the 9.26 mm line was 4.3% in peak power. The second harmonic generation efficiency versus the pump angle and wavelength is presented.