20 April 1998 Peculiarities of laser damage of AIIBVI single crystals
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The processes of damage in oriented ZnSe, CdS, ZnS, CdTe crystals under the effect of intensive radiation of CO2 laser were studied, the crystals being grown by the Bridgman method. The dependence of the damage pattern on the crystal structure and orientation was found. Types of cracks, changes in the dislocational structure and chemical composition of films around the damage crater were studied. Experimentally determined were the values of laser damage threshold on different crystallographic planes of AIIBVI crystals. Optical and thermomechanical characteristics of optical elements of crystalline zinc selenide with interference coatings of zinc oxide made by the original method of photostimulated oxidizing were investigated. It was found that such optical elements are characterized by high values of laser damage threshold, thermal stability and thermal strength. Revealed and studied was the effect of bulk glow of ZnSe crystals at their local irradiation with intensive radiation of CO2 laser. This effect precedes the sample damage and is observed in crystals with the concentration of the copper impurity 2 X 10-5...3 X 10-4 wt percent.
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Yuri A. Zagoruiko, Yuri A. Zagoruiko, O. A. Fedorenko, O. A. Fedorenko, "Peculiarities of laser damage of AIIBVI single crystals", Proc. SPIE 3244, Laser-Induced Damage in Optical Materials: 1997, (20 April 1998); doi: 10.1117/12.306972; https://doi.org/10.1117/12.306972

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