Efficient single-mode cw lasers based on monoclinic double potassium-(rare earth) tungstenate crystals containing Nd3+ ions with semiconductor-laser pumping

Abstract

Efficient (~ 20%) single-mode, cw and quasi-cw laser action of Nd3+ ions (in the 4F3/2→4I11/2 channel) has been achieved with diode-laser pumping for the first time at room temperature in monoclinic KY(WO4)2, KGd(WO4)2, and KLu(WO4)2 crystals with an ordered structure.