Kienel, MarcoMarcoKienelKlenke, ArnoArnoKlenkeEidam, TinoTinoEidamBaumgartl, MartinMartinBaumgartlJauregui, CesarCesarJaureguiLimpert, JensJensLimpertTünnermann, AndreasAndreasTünnermann2022-03-042022-03-042013https://publica.fraunhofer.de/handle/publica/23381210.1364/OE.21.029031The energy scaling of ultrashort-pulse systems employing simultaneously the techniques of chirped-pulse amplification and passively combined divided-pulse amplification is analyzed both experimentally and numerically. The maximum achievable efficiency is investigated and fundamental limitations originating from gain saturation, self-phase modulation and depolarization are discussed. A solution to these limitations could be an active stabilization scheme, which would allow for the operation of every single fiber amplifier at higher pulse energies.en621journal article