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Proceedings Paper

Numerical analysis of output performance of Nd-doped double-clad fiber lasers
Author(s): Nam Seong Kim; Toshihiro Hamada; R. Mahendra Prabhu; Cheng Li; Jie Song; Deyuan Shen; Anping Liu; Ken-ichi Ueda
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Paper Abstract

Numerical analysis for the high-power double-clad fiber lasers is presented and experimental results using different microscope objectives for focusing into a Nd-doped rectangular double-clad fiber also performed. The numerical analysis includes dependence of output power on output mirror reflectivity, absorbed pump power, loss, and fiber length and pump power distribution for the cases of one-end and two-end pumps with 20 dB/km loss. Calculated conversion efficiencies are 76.36%, 69.73%, and 63.84% for lossless, two-end pump, and one-end pump fiber lasers, respectively. Slope efficiencies from absorbed pump power/output powers measured using microscope objectives are 16.8%/182 mW, 53.8%/351 mW, 24.9%/1240 mW, and 13.9%/ 649 mW for magnifications of 5x, 10x, 20x, and 40x, respectively.

Paper Details

Date Published: 3 April 2000
PDF: 7 pages
Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); doi: 10.1117/12.380933
Show Author Affiliations
Nam Seong Kim, Univ. of Electro-Communications (United States)
Toshihiro Hamada, Univ. of Electro-Communications (Japan)
R. Mahendra Prabhu, Univ. of Electro-Communications (Japan)
Cheng Li, Univ. of Electro-Communications (Japan)
Jie Song, Univ. of Electro-Communications (Japan)
Deyuan Shen, Fukui Univ. (Singapore)
Anping Liu, Univ. of Electro-Communications (Japan)
Ken-ichi Ueda, Univ. of Electro-Communications (Japan)

Published in SPIE Proceedings Vol. 3889:
Advanced High-Power Lasers
Marek Osinski; Howard T. Powell; Koichi Toyoda, Editor(s)

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