Oxide Ceramic Laser
Semi-annual technical rept.
GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY
Pagination or Media Count:
Several attempts were made to reduce or eliminate orange peel and extended defect formation in NDY ceramics by introducing changes in powder preparation, processing, and thermal cycling conditions. The preparation of oxalate powder by an aerosol technique reduced residual porosity and orange peel in sintered material made from unmilled powder. A dry milling operation was, nevertheless, the most effective method of reducing orange peel. The lasing performance of NDY laser rods is probably limited by submicroscopic scattering centers having compositional variations in the solid solution matrix. Evidence of substructure in the matrix was revealed by ultramicroscopy and chemical etching techniques. A rapid cooling treatment, again, produced a laser rod with improved lasting performance. It was discovered that controlled oxidation of Yttralox generates a pronounced IR filter behavior.
- Lasers and Masers
- Ceramics, Refractories and Glass