Highly Er3+/Yb3+ Co-Doped Fluoroaluminate Glasses for Microchip Laser at 1.54 μm
来源期刊：JOURNAL OF RARE EARTHS2004年第4期
论文作者：胡丽丽 汪国年 徐时清 张丽艳 张军杰 戴世勋
Key words：microchip laser; fluoroaluminate glasses; 1.54 μm; rare earths;
Abstract: A series of highly Er3+/Yb3+ co-doped fluoroaluminate glasses were investigated in order to develop a microchip laser at 1.54 μm under 980 nm excitation. Measurements of absorption, emission and up-conversion spectra were performed to examine the effect of concentration quenching on spectroscopic properties. In the glasses with Er3+ concentrations below 10% (mol fraction), concentration quenching is low and the Er3+/Yb3+ co-doped fluoroaluminate glasses gave stronger fluorescence of 1.54 μm from the 4I13/2→ 4I15/2 transition than those of Er3+ singly-doped glasses. In the glass with Er3+ concentrations above 10%, concentration quenching of 1.54 μm obviously occurs more than that of the Er3+ singly-doped samples because of the back energy-transfer from Er3+ to Yb3+. To obtain the highest emission efficiency at 1.54 μm, the optimum in mol fraction when the Er3+ concentration is less than 10%.
胡丽丽1，汪国年1，徐时清1，张丽艳1，张军杰1，戴世勋1
(1.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Science,Shanghai 201800,China)
Abstract:A series of highly Er3+/Yb3+ co-doped fluoroaluminate glasses were investigated in order to develop a microchip laser at 1.54 μm under 980 nm excitation. Measurements of absorption, emission and up-conversion spectra were performed to examine the effect of concentration quenching on spectroscopic properties. In the glasses with Er3+ concentrations below 10% (mol fraction), concentration quenching is low and the Er3+/Yb3+ co-doped fluoroaluminate glasses gave stronger fluorescence of 1.54 μm from the 4I13/2→ 4I15/2 transition than those of Er3+ singly-doped glasses. In the glass with Er3+ concentrations above 10%, concentration quenching of 1.54 μm obviously occurs more than that of the Er3+ singly-doped samples because of the back energy-transfer from Er3+ to Yb3+. To obtain the highest emission efficiency at 1.54 μm, the optimum in mol fraction when the Er3+ concentration is less than 10%.
Key words:microchip laser; fluoroaluminate glasses; 1.54 μm; rare earths;
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