Power scaling limits of thulium and thulium:holmium in the 2 µm spectral region: a comparison

Clément Romano; Dieter Panitzek; Dominik Lorenz; Patrick Forster; Jan Lautenschläger; Julian Schneider; Marc Eichhorn; Christelle Kieleck

doi:10.1117/12.3031703

1 November 2024 Power scaling limits of thulium and thulium:holmium in the 2 μm spectral region: a comparison

Clément Romano, Dieter Panitzek, Dominik Lorenz, Patrick Forster, Jan Lautenschläger, Julian Schneider, Marc Eichhorn, Christelle Kieleck

Author Affiliations +

Proceedings Volume PC13201, High-Power Lasers and Technologies for Optical Countermeasures II; PC1320105 (2024) https://doi.org/10.1117/12.3031703
Event: Security + Defence, 2024, Edinburgh, United Kingdom

Abstract

The demand for high-power lasers in the 2 μm region is growing across various applications. Thulium-Doped Fiber Lasers (TDFL) lead with 50-60 % slope efficiencies and over 1 kW of output power. Thulium:Holmium-co-Doped Fiber Lasers (THDFL) show lower slope efficiencies but operate beyond 2.1 μm, beneficial for atmospheric applications. The latter laser type being so-far less explored. We compare TDFL and THDFL power scaling in a Master-Oscillator Power-Amplifier (MOPA) setup, assessing thermal constraints and output power limits for distinct fiber geometries. This study provides a direct comparison and important background on laser design to meet specific power requirements.

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Clément Romano, Dieter Panitzek, Dominik Lorenz, Patrick Forster, Jan Lautenschläger, Julian Schneider, Marc Eichhorn, and Christelle Kieleck "Power scaling limits of thulium and thulium:holmium in the 2 μm spectral region: a comparison", Proc. SPIE PC13201, High-Power Lasers and Technologies for Optical Countermeasures II, PC1320105 (1 November 2024); https://doi.org/10.1117/12.3031703

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