| Effect of concentration quenching on the spectroscopic properties of Er~(3+)/Yb~(3+) co-doped AlF_3-based glasses |
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| 作者姓名： | 张军杰 戴世勋 徐时清 汪国年 张丽艳 胡丽丽 |
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| 作者单位： | Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Science，Shanghai 201800 |
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| 基金项目： | This work was supported by the Rising-Star Project(No. 04QMX1448) of Shanghai Municipal Science and Technology Commission，the National Natural Science Foundation of China (No. 60207006). |
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| 摘 要： | A series of highly Er~(3+)/Yb~(3+) co-doped fluoroaluminate glasses have been investigated in order to develop a microchip laser at 1.54 μm under 980 nm excitation. Measurements of absorption, emission and upconversion spectra have been performed to examine the effect of Er~(3+)/Yb~(3+) concentration quenching on spectroscopic properties. In the glasses with Er~(3+) concentrations below 10 mol%, concentration quenching is very low and the Er~(3+)/Yb~(3+) co-doped fluoroaluminate glasses have stronger fluorescence of 1.54μm due to the ~4I_(13/2)→~4I_(15/2) transition than that of Er~(3+) singly-doped glasses. As Er~(3+) concentrations above 10 mol% in the Er~(3+)/Yb~(3+) co-doped samples, concentration quenching of 1.54μm does obviously occur as a result of the back energy transfer from Er~(3+) to Yb~(3+). To obtain the highest emission efficiency at 1.54μm, the optimum doping-concentration ratio of Er~(3+)/Yb~(3+) was found to be approximately 1:1 in mol fraction when the Er~(3+) concentration is l
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