Abstract: In this paper, large-size Eu³⁺∶CaF₂ laser crystals with Eu³⁺ doping concentrations of 250×10^-6, 1 000×10^-6 and 2 500×10^-6, respectively, were prepared by an automatic crystal control method based on Bridgman crystal growth method. The blank size of the ingots is ø210 mm×80 mm, which demonstrates it the largest Eu³⁺∶CaF₂ laser crystal reported in this field till now.

Key words: Eu³⁺∶CaF₂, laser crystal, rare earth doping, Bridgman method, automatic control