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Proceedings Paper

High-power single-mode tapered double-clad ytterbium fiber laser pumped by diode-laser bar
Author(s): V. Filippov; Y. Chamorovskii; J. Kerttula; A. Kholodkov; O. G. Okhotnikov
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Paper Abstract

Pump propagation and absorption in active tapered double-clad fiber has been analyzed based on a ray optics approach. Optimization of the longitudinal shape, absorption and angular distribution of the pump beam allowed for power scaling of a ytterbium fiber laser up to 600 W with high beam quality (M2≤1.08) and a slope efficiency of 63%. It is shown that the influence of vignetting in a tapered fiber can be avoided, resulting in high overall efficiency, in good agreement with the presented model.

Paper Details

Date Published: 19 February 2009
PDF: 10 pages
Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 719506 (19 February 2009); doi: 10.1117/12.807808
Show Author Affiliations
V. Filippov, Tampere Univ. of Technology (Finland)
Y. Chamorovskii, Institute of Radio and Electronics of the Russian Academy of Sciences (Russian Federation)
J. Kerttula, Tampere Univ. of Technology (Finland)
A. Kholodkov, Institute of Radio and Electronics of the Russian Academy of Sciences (Russian Federation)
O. G. Okhotnikov, Tampere Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 7195:
Fiber Lasers VI: Technology, Systems, and Applications
Denis V. Gapontsev; Dahv A. Kliner; Jay W. Dawson; Kanishka Tankala, Editor(s)

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