High-power single-mode tapered double-clad ytterbium fiber laser pumped by diode-laser bar

V. Filippov; Y. Chamorovskii; J. Kerttula; A. Kholodkov; O. G. Okhotnikov

doi:10.1117/12.807808

19 February 2009 High-power single-mode tapered double-clad ytterbium fiber laser pumped by diode-laser bar

V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, O. G. Okhotnikov

Proceedings Volume 7195, Fiber Lasers VI: Technology, Systems, and Applications; 719506 (2009) https://doi.org/10.1117/12.807808
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

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.

Citation Download Citation

V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, and O. G. Okhotnikov "High-power single-mode tapered double-clad ytterbium fiber laser pumped by diode-laser bar", Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 719506 (19 February 2009); https://doi.org/10.1117/12.807808

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