DISLOCATIONS IN RUBY LASER CRYSTALS

摘要

As part of a program to establish the effect of crystal imperfections on laser output, a detailed. study was made of the dislocation structure of ruby crystals obtained from various sources. Using KHSO4j as an etchant, a detailed mapping of the dislocation structure on the (0001) and the (1120) planes was performed. A less extensive study was made of the rhombohedra planes. The average dislocation density on the basal plane was 1.5 to 3XlO/cm and on the (1120) planes it was approximately 5 X lO/cm However, considerable variation existednbetween areas on a given plane. The sub boundaries in the basal plane tended to lie along [1100] type directions while those on the (1120) plane tended to lie:(a) parallel to the basal plane, (b) along traces of the (000l) plane, and (c) along normals to the traces of the (0001) planes. These orientations suggest that many of the dislocations lie on the (0001), {110l} and {1120} planes.