Ruby laser induced changes of the absorption spectrum of additively coloured CaF2:La, Er

Abstract

Doubly activated MeF crystals a r e interesting for their light sensitivity. The exchange of valency electrons of the foreign ions in a reversible way has been observed only on additively coloured crystals (1). Following other investigations of the system CaF :La, SE (2) this paper deals with some properties of CaF :La,Er which we found using a ruby laser, especially.