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

Lin Wang; Fengping Yan; Yongjun Fu; Yifang Li; Taorong Gong; Peng Liu; Shuisheng Jian

doi:10.1117/12.743452

21 November 2007 The effects of co-doping GeO₂ and Al³⁺ on ytterbium-doped silica-based fiber

Lin Wang, Fengping Yan, Yongjun Fu, Yifang Li, Taorong Gong, Peng Liu, Shuisheng Jian

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67810G (2007) https://doi.org/10.1117/12.743452
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

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.

Citation Download Citation

Lin Wang, Fengping Yan, Yongjun Fu, Yifang Li, Taorong Gong, Peng Liu, and Shuisheng Jian "The effects of co-doping GeO₂ and Al³⁺ on ytterbium-doped silica-based fiber", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67810G (21 November 2007); https://doi.org/10.1117/12.743452

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