KY(WO/sub 4/)/sub 2/:Yb/sup 3+/ planar waveguide laser

Continuous-wave waveguide lasing in a thin layer of monoclinic KY(WO/sub 4/)/sub 2/:Yb/sup 3+/ grown by liquid-phase epitaxy is demonstrated at 1024 nm in the fundamental mode with 50% slope efficiency and 290 mW of output power.