FLUORESCENCE MECHANISMS OF Tm3+- AND Yb3+/Tm3+ DOPED A1F3-BASED FLUORIDE GLASS

• 来源期刊: 中国物理(英文版)
• 学科: 物理学
• 关键词: fluoroaluminate glass Judd-Ofelt analysis energy transfer rare earth
• 年，卷（期）: 2001,（1）
• 页码范围: 58-64
• 页数: 7页
• 分类号: O4
• 语种: 英文

摘要

A complete set of spectroscopic parameters, including Judd-Ofelt parameters, radiative transition probabilities, radiative lifetime, branching ratios and integrated absorption cross section, have been calculated for Tm3+- doped fluoroaluminate (AYF) glass, based on the measured absorption spectra. The mechanism of Tm3+ →Tm3+ and Yb3+ Tm3+ energy transfers and fluorescence properties have been investigated in both Tm3+ single-doped and Yb3+/Tm3+ double-doped AYF glasses. The cross-relaxation process, 3F4 +3H6→23H4, is proved, which makes the optimum Tm3+ concentration of 1.77μm fluorescence (3H4→3H6) much higher than 1.45μm fluorescence (3F4→3H4) in Tm3+:AYF glasses. In Yb3+/Tm3+:AYF glasses, a stronger concentration quenching is found for the 476nm emission than that for the 797nm emission, and is discussed under the 970nm-excitation.