Chemical and Optical Studies of Samarium Doped CaF[sub 2] Type Single Crystals

Single crystals of and were grown by the Czochralski technique and doped with varying concentrations of samarium. Complete solid solution was found in the pseudobinary system with a minimum near 50% at 1330° ± 10°C. The concentration of Sm +2 depended on the melt concentrations of and Sm metal, and the samarium segregation coefficient did not change significantly with samarium concentration. The fluorescence efficiency of Sm +2 as a function of Sm +2 concentration appeared to go to a broad maximum at about 0.1% Sm +2 . The fluorescent emission in showed pronounced inhomogeneous line broadening.