Thermostable interference oxide coatings for active elements of IR lasers

Abstract

Strong thermostable oxide interference coatings transparent in the visible and IR spectral regions are obtained on the surface of active elements of ZnSe:Cr2+-lasers by the method of photothermal oxidation. The mechanical strength of such coatings is more than by a factor of 1,5 higher in comparison with the corresponding characteristic of the coatings obtained by the method of thermal oxidation. In the generation band of Cr2+ ions (2…3 мm) the optical transmission of ZnSe:Cr2+ elements with the antireflection coatings reaches 95%.

Keywords

• active element of the laser
• ZnSe:Cr2+
• ZnO
• anti-reflective coating