Efficient high-power laser operation of Yb:KLu(WO4)2 crystals cut along the principal optical axes (original) (raw)

Abstract

High-power continuous-wave laser operation was demonstrated with Yb:KLu(WO4)2 crystals cut along the Np, Nm, and Ng principal optical axes, achieving a nearly equal slope efficiency of 79%–80% in the absence of thermal effects. The Ng-cut crystal proved to be the most advantageous for power scaling as well as efficient pumping. A maximum output power of 11.0 W was produced from a 2 mm thick uncoated Ng-cut crystal in a ∼7 mm long plano–concave resonator end pumped by a fiber-coupled diode; the corresponding optical-to-optical efficiency was 68%.

© 2007 Optical Society of America

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