Large scale solid state lasers will require single crystal gain elements which, by virtue of requisite size and optical quality, represent a significant challenge to current crystal growth technology. This paper examines these requirements and relates them to crystal growth options. Crystal growth scaling considerations are reviewed and a host material figure of merit for scaling is derived.
Robert C Morris,
"Crystal Growth And The Future Of Solid State Lasers", Proc. SPIE 0681, Laser and Nonlinear Optical Materials, (9 March 1987); doi: 10.1117/12.939617; https://doi.org/10.1117/12.939617