7-Rod-Core Thulium-Doped Fiber for Enhanced Fiber Laser Cooling

Ivo Bartoň; Jan Aubrecht; Bara Švejkarová; Jan Pokorný; Michal Kamrádek; Ondřej Podrazký; Petr Vař'ak; Ivan Kaš'ik; Martin Grábner; Pavel Peterka

arXiv · 2603.19916

7-Rod-Core Thulium-Doped Fiber for Enhanced Fiber Laser Cooling

Ivo Bartoň·Jan Aubrecht·Bara Švejkarová·Jan Pokorný·Michal Kamrádek·Ondřej Podrazký·Petr Vař'ak·Ivan Kaš'ik·Martin Grábner·Pavel Peterka

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Abstract

Structured-core thulium-doped fibers were developed to reduce heat load, enable shorter-wavelength operation, and achieve a pedestal-free design. In a proof-of-principle experiment, laser slope efficiencies of 52% at 1907 nm and 54% at 1940 nm were achieved with respect to absorbed power.

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Ivo Bartoň, Jan Aubrecht, Bara Švejkarová, Jan Pokorný, Michal Kamrádek, Ondřej Podrazký, Petr Vař'ak, Ivan Kaš'ik, Martin Grábner, Pavel Peterka. 2026-03-20. 7-Rod-Core Thulium-Doped Fiber for Enhanced Fiber Laser Cooling. https://arxiv.org/abs/2603.19916

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