Schmidt, O.O.SchmidtRothhardt, J.J.RothhardtRöser, F.F.RöserLinke, S.S.LinkeSchreiber, T.T.SchreiberRademaker, K.K.RademakerLimpert, J.J.LimpertErmeneux, S.S.ErmeneuxYvernault, P.P.YvernaultSalin, F.F.SalinTünnermann, A.A.Tünnermann2022-03-032022-03-032007https://publica.fraunhofer.de/handle/publica/21345310.1364/OL.32.0015512-s2.0-37249018291We report on a Q-switched short-length fiber laser producing 100 W of average output power at 100 kHz repetition rate and pulse durations as short as 17 ns. Up to 2 mJ of energy and sub-10-ns pulse duration are extracted at lower repetition rates. This performance is obtained by employing a rod-type ytterbium-doped photonic crystal fiber with a 70 mu m core as gain medium, allowing for very short pulse durations, high energy storage, and emission of a single-transverse-mode beam.en620535journal article