Applications：
• Generation second harmonics on CO and CO2 - lasers • Optical parametric oscilator • Different frequency generator to middle infrared regions up to 12μm. • Frequency mixing in the middle IR region from 4.0 to 18.3 µm • Tuneable solid state lasers (OPO pumped by Nd:YAG and others lasers operating in 1200 to 10000 nm region with efficiency 0.1 to 10 %) • Optical narrow-band filters in the region near isotropic point (0.4974 m at 300 °K), transmission band being tuned at temperature variation • Up-conversion of CO2 laser radiation image into near-IR or visible region by using/ or use of Nd:YAG, ruby or dye lasers with efficiency up to 30 %