| Er3+掺杂重金属氧氟锗酸盐玻璃的光谱性质和上转换机理 |
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| 引用本文： | 徐时清,汪国年,杨中民,戴世勋,胡丽丽,姜中宏.Er3+掺杂重金属氧氟锗酸盐玻璃的光谱性质和上转换机理[J].中国激光,2004,31(10):198-1202. |
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| 作者姓名： | 徐时清 汪国年 杨中民 戴世勋 胡丽丽 姜中宏 |
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| 作者单位： | 中国科学院上海光学精密机械研究所,上海,201800 |
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| 基金项目： | 国家自然科学基金(60207006和60307004)，上海市光科技项目(022261046)资助课题。 |
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| 摘 要： | 研究了Er^3 掺杂重金属氧氟锗酸盐玻璃的吸收光谱和上转换光谱性质，分析了玻璃中Er^3 的上转换发光机理，应用Judd—Ofelt理论计算了Er^3 在玻璃中的强度参数Ωt(t=2，4，6)，自发辐射跃迁几率、荧光分支比和辐射寿命。结果表明，在975nm抽运光激发下，观察到强烈的绿光和微弱的红光；绿光和红光发射是由于双光子吸收过程，其上转换机理是能量转换(ET)和激发态吸收(ESA)。拉曼光谱分析表明，对于上转换发光，玻璃结构中的F^-离子起到重要作用。
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| 关 键 词： | 材料 光谱性质 Er^3＋掺杂重金属氧氟锗酸盐玻璃 上转换 |
| 收稿时间： | 2003/6/19 |
Spectra Properties and Upconversion Mechanisms of Er3+-Doped Heavy Metal Oxyfluoride Germanate Glass |
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| XU Shi qing,WANG Guo nian,Yang Zhong min,DAI Shi xun,HU Li li,JIANG Zhong hong.Spectra Properties and Upconversion Mechanisms of Er3+-Doped Heavy Metal Oxyfluoride Germanate Glass[J].Chinese Journal of Lasers,2004,31(10):198-1202. |
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| Authors: | XU Shi qing WANG Guo nian Yang Zhong min DAI Shi xun HU Li li JIANG Zhong hong |
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| Abstract: | The absorption and upconversion spectra of Er3+-doped heavy metal oxyfluoride germanate glass were investigated, and upconversion mechanisms of Er3+ in the glass were analyzed. The Judd-Ofelt intensity parameters Ωt (t=2, 4, 6), spontaneous transition probability, fluorescence branching ratio and radiative lifetime τrad of each energy levels for Er3+ were calculated by Judd-Ofelt theory. The results showed that the intense green and weak red emissions were observed, a two-photon upconversion process was assigned to the green and red emissions, and the possible upconversion mechanisms were involved in excited state absorption and energy transfer between excited Er3+ ions. Raman spectrum indicated the fluoride ions in the glass network had important influence on upconvesion fluorescence. |
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| Keywords: | materials spectra properties Er~(3+)-doped heavy metal oxyfluoride germanate glass upconversion |
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