中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74211-074211.doi: 10.1088/1674-1056/19/7/074211
李平雪, 邹淑珍, 张雪霞, 李港
Li Ping-Xue(李平雪)†, Zou Shu-Zhen(邹淑珍), Zhang Xue-Xia(张雪霞), and Li Gang (李港)
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.
中图分类号: (Fiber lasers)