Anisotropic absorption and luminescence and quasi-CW laser operation of Eu^3#x002B;:KGd(WO4)2 monoclinic crystal

摘要

Monoclinic double tungstates nowadays attract attention as appropriate host materials for laser-active trivalent rare-earth ions. Eu³⁺ ion allows one to obtain intense visible luminescence associated with ⁵D0→⁷F2,4 transitions. Present paper is devoted to the study of spectroscopic properties and laser potential of Eu-doped potassium gadolinium tungstate single crystal grown by TSSG technique (from the flux). It was motivated by recent realization of pulsed Eu:KGd(WO4)2 laser [1]. As a result, quasi-cw Eu:KGd(WO4)2 laser operating at room temperature was demonstrated for the first time.