Tao Li, Qin-yuan Zhang, Zhou-ming Feng, Yue-hui Liu, Zai-de Deng and Zhong-hong Jiang Institute of Optical Communication Materials, South of China University of Technology, Guangzhou, 510640, China Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology (South China University of Technology), Ministry of Education, Guangzhou, 510640, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China
<正> Optical spectroscopic properties of Er3+-doped alkaline-earth metal modified fluoropho sphate glasses have been investigated experimentally for developing broadband fiber and planar amplifiers. The results show a strong correlation between the alkaline-earth metal content and the spectroscopic parameters such as absorption and emission cross sections, full widths at half-maximum and Judd-Ofelt intensity parameters. It is found that strontium ions could have more influences on the Judd-Ofelt intensity parameters and the absorption and emission cross sections than other alkaline-earth metal ions such as Mg2+, Ca2+, Ba2+. The sample containing 23 mol% strontium fluoride exhibits the maximum emission cross section of 7.58 ×10-21 cm2, the broadest full width at half-maximum of 65 nm and the longer lifetime of 8.6 ms among the alkaline-earth metal modified fluorophosphates glasses studied. The Judd-Ofelt intensity parameter Ω6s, the emission cross sections and the full widths at half-maximum in the Er3+-doped fluorophosphate glasses studied are larger than in the silicate and phosphate glasses.
Fluorophosphate glasses, Judd-Ofelt parameters, Spectroscopic properties.
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