Crystal-derived double-clad fibers for high gain and high efficiency Tm fiber lasers

Martin Leich; Robert Müller; Sonja Unger; Anka Schwuchow; Jan Dellith; Jens Kobelke; Adrian Lorenz; Matthias Jäger

doi:10.1117/12.2650340

8 March 2023 Crystal-derived double-clad fibers for high gain and high efficiency Tm fiber lasers

Martin Leich, Robert Müller, Sonja Unger, Anka Schwuchow, Jan Dellith, Jens Kobelke, Adrian Lorenz, Matthias Jäger

Author Affiliations +

Proceedings Volume 12400, Fiber Lasers XX: Technology and Systems; 1240012 (2023) https://doi.org/10.1117/12.2650340
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We investigate Tm-doped double-clad fibers drawn from fused silica preforms with inserted Tm:YAG laser crystal rods. Based on the Molten-Core-Method the drawn crystal-derived fibers show typical amorphous properties covering a Tm concentration range from 0.2 to 0.84 mol% Tm2O3. They are studied in terms of their suitability of for multi-Watt level fiber lasers and compared to a Tm-laser fiber conventionally fabricated by Modified Chemical Vapor Deposition and solution doping. For the crystal-derived fibers, we demonstrate up to 4 W output power around 2 μm emission wavelength and a slope efficiency of 47 %, which are to date the highest achieved values for 790 nm pumping.

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Citation Download Citation

Martin Leich, Robert Müller, Sonja Unger, Anka Schwuchow, Jan Dellith, Jens Kobelke, Adrian Lorenz, and Matthias Jäger "Crystal-derived double-clad fibers for high gain and high efficiency Tm fiber lasers", Proc. SPIE 12400, Fiber Lasers XX: Technology and Systems, 1240012 (8 March 2023); https://doi.org/10.1117/12.2650340

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