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arXiv · 2101.12613

Experimental Investigations on the TMI Thresholds of Low-NA Yb-doped single mode fibers

Franz Beier·Friedrich Moeller·Bettina Sattler·Johannes Nold·Andreas Liem·Christian Hupel·Stefan Kuhn·Sigrun Hein·Nicoletta Haarlammert·Thomas Schreiber·Ramona Eberhardt·Andreas Tuennermann
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Abstract

In this contribution we investigate the transversal mode instability behavior of an ytterbium doped commercial 20/400 fiber and obtain 2.9 kW of output power after optimizing the influencing parameters. In this context, we evaluate the influence of the bend diameter and the pump wavelength within the scope of the absorption length and the length of the fiber. Furthermore with a newly developed fiber we report on 4.4 kW of single-mode output power at 40 cm bend diameter.

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Franz Beier, Friedrich Moeller, Bettina Sattler, Johannes Nold, Andreas Liem, Christian Hupel, Stefan Kuhn, Sigrun Hein, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tuennermann. 2021-01-29. Experimental Investigations on the TMI Thresholds of Low-NA Yb-doped single mode fibers. https://doi.org/10.1364/ol.43.001291

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