Evaluation of Laser Window Materials
Abstract
Chalcogenide glasses within the Ge-Se-As-Sb system have been prepared and characterized before and after heat treatment; they are homogeneous to a fine scale, but appreciable optical absorption at 10.6 micrometers is present, due to oxygen impurities. The effect of gettering additions of Ti and Zr in the glasses to decrease the IR absorption has been examined. Heat treatment shows that the glasses are stable against devitrification and may withstand many hours of thermal exposure at 300 C without significant change in mechanical properties. A novel attempt to increase the toughness and water resistance of sintered alkali halide windows has been carried out by coating the alkali halide grains with polyethylene prior to hot pressing. Results, however, have been disappointing owing to the difficulty of obtaining a really coherent coating. The results of limited tests of the increase in water resistance imparted by coatings of deposited chalcogenide glasses are reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1972
- Accession Number
- AD0906561
Entities
People
- Derek B. Dove
- Larry L. Hench
- Ronald E. Loehman
Organizations
- University of Florida