Figure 2 from On Yb:CaF2 and Yb:SrF2 : Review of spectroscopic and thermal properties and their impact on femtosecond and high power laser performance | Semantic Scholar
CaF2:Yb : un laser en guide d'onde ultra compact.
Laser science: Innovative solid state lasers with Yb3+-doped CaF2 - LaF3 ceramic gain media