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Chin. Phys. B, 2010, Vol. 19(7): 074211    DOI: 10.1088/1674-1056/19/7/074211
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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)
Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
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.
Keywords:  quasi-three-level      Yb-doped fibre      980 nm laser  
Revised:  22 December 2009      Accepted manuscript online: 
PACS:  42.55.Wd (Fiber lasers)  
  42.60.By (Design of specific laser systems)  
  42.81.Dp (Propagation, scattering, and losses; solitons)  
  42.81.Qb (Fiber waveguides, couplers, and arrays)  

Cite this article: 

Li Ping-Xue(李平雪), Zou Shu-Zhen(邹淑珍), Zhang Xue-Xia(张雪霞), and Li Gang (李港) A 980 nm Yb-doped single-mode fibre laser with 946 nm Nd:YAG laser as pump source 2010 Chin. Phys. B 19 074211

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