Thermal lens study of the OH- influence on the fluorescence efficiency of Yb3+-doped phosphate glasses -: art. no. 071911

被引:39
作者
Jacinto, C [1 ]
Oliveira, SL
Nunes, LAO
Catunda, T
Bell, MJV
机构
[1] USP, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
[2] UFJF, Dept Fis, BR-36036330 Juiz De Fora, MG, Brazil
基金
巴西圣保罗研究基金会;
关键词
D O I
10.1063/1.1861960
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this work, the thermal lens (TL) technique is used to determine the fluorescence quantum efficiency (eta) of Yb3+-doped phosphate glasses. The role of nonradiative processes such as energy migration among Yb ions and the interaction with OH- radicals are presented and discussed. Two sets of samples with the same Yb concentrations were prepared, one at ambient conditions (set A) and the other in N-2 atmosphere (set N). The TL technique was shown to be very sensitive to the amount of OH radicals. Moreover, the eta values obtained from the TL method are in good agreement with the calculate ones (based on lifetime measurements). The results indicate that TL can be a valuable technique to evaluate the quantum efficiency and nonradiative rates in ion-doped materials. (C) 2005 American Institute of Physics.
引用
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页码:1 / 3
页数:3
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