Lorenz, DominikDominikLorenzRupp, MariusMariusRuppPanitzek, DieterDieterPanitzekRomano, ClémentClémentRomanoForster, PatrickPatrickForsterSchneider, JulianJulianSchneiderEichhorn, MarcMarcEichhornKieleck, ChristelleChristelleKieleck2024-05-082024-05-082024https://publica.fraunhofer.de/handle/publica/46768710.1117/12.3003038In this work we propose a simulation tool to analyze the case of conduction-driven thermal blooming and compare the results with measurements at the 2055 nm absorption line of CO2. Using a split-step beam propagation method and incorporating the spatial refractive index change related to the absorption-driven radial temperature gradient resulting from conduction, the effect of beam distortion can be described for arbitrary wavelengths and various atmospheric conditions. The model is benchmarked by experimental investigations using a tunable 100-W thulium fiber laser.enconference paper