Site-selective spectroscopy of Ce3+ and Yb3+ ions in double-doped SrAlF5 crystals

Abstract This paper reports a study of absorption, luminescence and excitation spectra of single- and double-doped Ce 3+ ,Yb 3+ :SrAlF 5 (0.5 at%.) single crystals. Spectral properties of different types of impurity centers of Ce 3+ , Yb 3+ and Yb 2+ ions are described. Experimental energy level diagrams for optically nonequivalent Ce 3+ , Yb 2+ and Yb 3+ centers in double-doped Ce 3+ , Yb 3+ : SrAlF 5 single crystals are suggested. Lasing on Ce:SAF single crystal at 290 nm under 248 nm pumping was demonstrated for the first time.