The AgGaSe2 crystals are used for frequency
doubling and three-frequency mixing. The parametric oscillators on the base of those crystals
can produce the continuously tunable radiation in the spectral range from 1.34 mm to 18 mm
with suitable pump laser. The low absorption of our AgGaSe2 crystals results
in the fact, that 80 mm length element has transmission value 66.4% on 1.06 mm wavelength,
which is in accordance with the theoretical value of Fresnel loses for the crystal
without of any absorption. We offer you the big size crystals with high quality and the
moderate price. With those crystals the record results of conversion efficiency in
comparison with all known infrared materials have been obtained. SHG efficiency of CO2
laser radiation for 40 mm length elements was about 20% (pulse length – 80 ns, pump energy - 2 J).
Wide aperture of 17*l7*40 mm AgGaSe2 elements gives an opportunity of radiation
wavelength tuning from 9 to 12 mm by means of the crystal turning.