Eidam, T.T.EidamRöser, F.F.RöserSeise, E.E.SeiseGottschall, T.T.GottschallHädrich, S.S.HädrichRothhardt, J.J.RothhardtSchreiber, T.T.SchreiberLimpert, J.J.LimpertTünnermann, A.A.Tünnermann2022-03-112022-03-112009https://publica.fraunhofer.de/handle/publica/36548910.1117/12.811903We report on an ytterbium-doped fiber CPA system delivering 325 W of average power at 40 MHz repetition rate corresponding to 8.2 J pulse energy. The pulse duration is as short as 375 fs resulting in 22 MW of peak power.en620conference paper