High efficiency of a holmium doped fiber laser in clad-pump configuration

Bastien Beaumont; Pierre Bourdon; Alexandre Barnini; Louanne Kervella; Thierry Robin; Julien Le Gouët

doi:10.1117/12.2646559

8 March 2023 High efficiency of a holmium doped fiber laser in clad-pump configuration

Bastien Beaumont, Pierre Bourdon, Alexandre Barnini, Louanne Kervella, Thierry Robin, Julien Le Gouët

Proceedings Volume 12400, Fiber Lasers XX: Technology and Systems; 1240008 (2023) https://doi.org/10.1117/12.2646559
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We recently developed a holmium-doped triple-clad fiber (Ho-3CF) for laser emission beyond 2.1 μm. In a clad-pumped fiber laser oscillator emitting at 2.12 μm, we obtained an optical efficiency of 73% with respect to the absorbed pump power at 1.94 μm, and a maximum signal power of 62 W. We present here the comparison between the laser measurements and a numerical simulation, together with the measurements of the required physical parameters (crosssections, attenuations…). The alumino-silicate core composition of our initial Ho-3CF samples required the introduction of a pedestal to preserve the single spatial-mode guiding. We also present our preliminary results on a new aluminophospho-silicate core composition, in order to suppress the initial pedestal and simplify the fabrication process. Both samples were also analyzed in core-pumped laser configuration.

Conference Presentation

Citation Download Citation

Bastien Beaumont, Pierre Bourdon, Alexandre Barnini, Louanne Kervella, Thierry Robin, and Julien Le Gouët "High efficiency of a holmium doped fiber laser in clad-pump configuration", Proc. SPIE 12400, Fiber Lasers XX: Technology and Systems, 1240008 (8 March 2023); https://doi.org/10.1117/12.2646559

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