Müller, M.M.MüllerAleshire, C.C.AleshireStark, L.H.L.H.StarkBuldt, J.J.BuldtSteinkopff, A.A.SteinkopffHaddad, E.E.HaddadLegare, F.F.LegareKlenke, A.A.KlenkeTünnermann, A.A.TünnermannLimpert, J.J.Limpert2022-03-152022-03-152020https://publica.fraunhofer.de/handle/publica/41192210.1364/ASSL.2020.ATu4A.2We present a twelve-channel coherently-combined ultrafast fibre laser delivering 10.4 kW average power at 80 MHz repetition rate with 254 fs pulse duration and excellent beam quality (M2 ⤠1.2). Further power scaling is discussed.en620conference paper