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Proceedings Paper

The effects of co-doping GeO2 and Al3+ on ytterbium-doped silica-based fiber
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Paper Abstract

Four types of YDFs with different Al3+ concentration and mole content of GeO2 were manufactured and the refractive index and absorption spectra of these fibers were explored. With the comparison of four YDFs and detailed analyze, it was found that higher Al3+ concentration leads to more GeO2 volatilization, which results in the refractive index decrease. Therefore, mole content of GeO2 should be increased when co-doping Al3+ in YDF to maintain numerical aperture. Meanwhile, the temperature of making porous layer should be controlled exactly to obtain good repetition of Al3+- codoped YDF as the little change of temperature has little effect on mole content of GeO2 and SiO2 but has great effect on compactness of porous layer. By drawing the fiber and testing the related parameters, the results show that the optimum temperature range for making soot layer should between 1440°C and 1480°C where the absorption coefficients were as high as 620dB/m with better repeatability. Finally, the ratio of GeO2 to SiO2 should be controlled to obtain long fluorescence lifetime for fabricating highly ytterbium-doped fiber with required numerical aperture.

Paper Details

Date Published: 21 November 2007
PDF: 6 pages
Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67810G (21 November 2007); doi: 10.1117/12.743452
Show Author Affiliations
Lin Wang, Beijing Jiaotong Univ. (China)
Fengping Yan, Beijing Jiaotong Univ. (China)
Yongjun Fu, Beijing Jiaotong Univ. (China)
Yifang Li, Beijing Jiaotong Univ. (China)
Taorong Gong, Beijing Jiaotong Univ. (China)
Peng Liu, Beijing Jiaotong Univ. (China)
Shuisheng Jian, Beijing Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 6781:
Passive Components and Fiber-based Devices IV
Ming-Jun Li; Jianping Chen; Satoki Kawanishi; Ian H. White, Editor(s)

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