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

被引：2
|
作者：
Filippov, V. [1 ]
Chamorovskii, Y. [2 ]
Kerttula, J. [1 ]
Kholodkov, A. [2 ]
Okhotnikov, O. G. [1 ]
机构：
[1] Tampere Univ Technol, Optoelect Res Ctr, FIN-33101 Tampere, Finland
[2] Russian Acad Sci, Inst Radio & Elect, Moscow 125009, Russia
来源：
FIBER LASERS VI: TECHNOLOGY, SYSTEMS, AND APPLICATIONS | 2009年 / 7195卷
关键词：
Fiber lasers and amplifiers; active optical fiber; tapered optical fiber;
D O I：
10.1117/12.807808
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 (M-2 <= 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.
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页数：10
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