The laser performance of Nd:KGW (neodymium-doped potassium gadolinium tungstate) end pumped by cw or quasi-cw high-power diode laser bars is studied and compared to Nd:YAG. In cw operation, thermal problems in Nd:KGW are quite important, whereas in quasi-cw operation, the optical and slope efficiencies attained with Nd:KGW are clearly better than with Nd:YAG.
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Thomas Graf (1995) studied this question.