Yb-doped sesquioxide thin disk lasers exceeding 300 W of output power in continuous-wave operation

We report on VBG-diode-pumped Yb:Lu<inf>2</inf>O<inf>3</inf>, Yb:Sc<inf>2</inf>O<inf>3</inf>, and Yb:LuScO<inf>3</inf> thin disk lasers delivering more than 250 W of output power at optical-to-optical efficiencies up to 73%. 140 W of fundamental-mode output power were obtained with Yb:Lu<inf>2</inf>O<inf>3</inf>.

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