ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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 |
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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.
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Revised: 22 December 2009
Accepted manuscript online:
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.60.By
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(Design of specific laser systems)
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42.81.Dp
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(Propagation, scattering, and losses; solitons)
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42.81.Qb
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(Fiber waveguides, couplers, and arrays)
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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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