Effect of lithium-potassium mixed alkali on spectroscopic properties of Er3+-doped aluminophosphate glasses
Fang Yong-Zheng(房永征)a)b)†, Liao Mei-Song(廖梅松)a), and Hu Li-Li(胡丽丽)a)
a Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 201800, China; b Shanghai Institute of Technology, Shanghai 200023, China
Abstract Er$^{3+}$-doped lithium-potassium mixed alkali aluminophosphate glasses belonging to the oxide system $x$K$_2$O-(15-$x$)Li$_2$O-4B$_2$O$_3$-11Al$_2$O$_3$-5BaO-65P$_2$O$_5$ are obtained in a semi-continuous melting quenching process. Spectroscopic properties of Er$^{3+}$-doped glass matrix have been analysed by fitting the experimental data with the standard Judd--Ofelt theory. It is observed that Judd--Ofelt intensity parameters ${\it\Omega}_ t (t= 2$, 4 and 6) of Er$^{3+}$ change when the second alkali is introduced into glass matrix. The variation of line strength $S_{\rm ed}$[$^4$I$_{13/2}$,$^4$I$_{15/2}$] follows the same trend as that of the ${\it\Omega}_6$ parameter. The effect of mixed alkali on the spectroscopic properties of the aluminophosphate glasses, such as absorption cross-section, stimulated emission cross-section, spontaneous emission probability, branching ratio and the radiative lifetime, has also been investigated in this paper.
Received: 20 October 2006
Revised: 29 December 2006
Accepted manuscript online:
Fund: Project supported by
the Young Teacher Foundation of Shanghai Education Committee (Grant
No 04YQHB162) and the National Natural Science Foundation of China
(Grant No 50572110).
Cite this article:
Fang Yong-Zheng(房永征), Liao Mei-Song(廖梅松), and Hu Li-Li(胡丽丽) Effect of lithium-potassium mixed alkali on spectroscopic properties of Er3+-doped aluminophosphate glasses 2007 Chinese Physics 16 1736
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