A 70 W thulium-doped all-fiber laser operating at 1940 nm

Adrian Grzegorczyk, Marcin Mamajek

Abstract


An all-fiber thulium-doped fiber laser operating at a wavelength of 1940 nm is reported. A maximum output continuous-wave power of 70.7 W with a slope efficiency of 59%, determined with respect to the absorbed pump power, was demonstrated. The laser delivered almost a single-mode beam with a beam quality factor of < 1.3.

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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