Schneider, JulianJulianSchneiderLorenz, DominikDominikLorenzLautenschläger, JanJanLautenschlägerRomano, ClémentClémentRomanoEichhorn, MarcMarcEichhornKieleck, ChristelleChristelleKieleck2025-02-032025-02-032024https://publica.fraunhofer.de/handle/publica/48318410.1364/ASSL.2024.AM3A.1This study discusses the limitations for pulse energy extraction in nanosecond-pulsed rare-earth-doped fiber lasers. Optimization of the fiber length considering reabsorption effects leads to the demonstration of pulse energies of 1.9 mJ at an average output power of 114 W and an emission wavelength of 2050 nm from a Tm3+-doped flexible photonic crystal fiber.enconference paper