Goth, KatharinaKatharinaGothVergara, InèsInèsVergaraGriesbeck, MichaelMichaelGriesbeckEitner, MadeleineMadeleineEitnerRupp, MariusMariusRuppEichhorn, MarcMarcEichhornKieleck, ChristelleChristelleKieleck2024-03-042024-03-042023https://publica.fraunhofer.de/handle/publica/46279310.1364/assl.2023.jm4a.23We present an actively Q-switched Ho3+ :YAG master oscillator power am plifier system with 67.5 % slope efficiency and 122 W average power and a pulse energy of 2.4 mJ. The dual-end-pumped system achieves a near-diffraction-limited beam quality factor of M2 ≈ 1.2.enconference paper