中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74211-074211.doi: 10.1088/1674-1056/19/7/074211

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A 980 nm Yb-doped single-mode fibre laser with 946 nm Nd:YAG laser as pump source

李平雪, 邹淑珍, 张雪霞, 李港   

  1. Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China when the fibre length is 29.5 cm close to an optimal fibre length in theory. The experimental results accord well with the theoretical analyses.
  • 修回日期:2009-12-22 出版日期:2010-07-15 发布日期:2010-07-15

A 980 nm Yb-doped single-mode fibre laser with 946 nm Nd:YAG laser as pump source

Li Ping-Xue(李平雪)†, Zou Shu-Zhen(邹淑珍), Zhang Xue-Xia(张雪霞), and Li Gang (李港)   

  1. Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
  • Revised:2009-12-22 Online:2010-07-15 Published:2010-07-15

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摘要： Based on rate equations, this paper gives expressions of the output power, the pump power threshold, the slope efficiency, the fibre optimal length and the laser gain of a quasi-three-level Yb-doped fibre laser. The gain relationship between quasi-three-level system and four-level system is also given, which provides a theoretical basis for suppressing the four-level transmissions. In the experiment, we adopt the backward pumping configuration and use a linear cavity. The Yb-doped fibre laser has an output power of 372 mW of single-mode laser emission at 980 nm with a slope efficiency of 21.2% when the fibre length is 29.5~cm close to an optimal fibre length in theory. The experimental results accord well with the theoretical analyses.

Abstract: Based on rate equations, this paper gives expressions of the output power, the pump power threshold, the slope efficiency, the fibre optimal length and the laser gain of a quasi-three-level Yb-doped fibre laser. The gain relationship between quasi-three-level system and four-level system is also given, which provides a theoretical basis for suppressing the four-level transmissions. In the experiment, we adopt the backward pumping configuration and use a linear cavity. The Yb-doped fibre laser has an output power of 372 mW of single-mode laser emission at 980 nm with a slope efficiency of 21.2% when the fibre length is 29.5~cm close to an optimal fibre length in theory. The experimental results accord well with the theoretical analyses.

Key words: quasi-three-level, Yb-doped fibre, 980 nm laser

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.By (Design of specific laser systems) 42.81.Dp (Propagation, scattering, and losses; solitons) 42.81.Qb (Fiber waveguides, couplers, and arrays)