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

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.

Conference Presentation

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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