Apparatus for the coloration of laser-quality alkali halide crystals

Abstract

A heat-pipe apparatus allowing for the additive coloration of laser-quality alkali halide crystals is described. It has the following features: (1) Prepolished crystals emerge ready for direct installation in the laser; (2) F-center densities are directly proportional to the buffer gas pressure; (3) An air lock allows the same charge of alkali metal to be used many times over.