FLUORESCENCE MECHANISMS OF Tm3+- AND Yb3+/Tm3+ DOPED AlF3-BASED FLUORIDE GLASS |
| |
Authors: | Zhang Long Zhang Jun-jie Hu He-fang and Lin Feng-ying |
| |
Institution: | Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China |
| |
Abstract: | 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+\Leftrightarrow 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→33H4) 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. |
| |
Keywords: | fluoroaluminate glass Judd-Ofelt analysis energy transfer rare earth |
|
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|