Effect of lithium-potassium mixed alkali on spectroscopic properties of Er3+-doped aluminophosphate glasses

• 来源期刊: 中国物理（英文版）
• 关键词: non-crystalline materials mixed alkali radiative lifetime Judd-Ofelt theory
• 年，卷（期）: 2007,（6）
• 页码范围: 1736-1742
• 页数: 7页
• 语种: 英文

摘要

Er3+-doped lithium-potassium mixed alkali aluminophosphate glasses belonging to the oxide system xK2O-(15-x)Li2O-4B2O3-11Al2O3-5BaO-65P2O5 are obtained in a semi-continuous melting quenching process. Spectroscopic properties of Er3+-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 Ωt(t = 2, 4 and 6) of Er3+ change when the second alkali is introduced into glass matrix. The variation of line strength Sed[4I13/2,4I15/2] follows the same trend as that of the Ω6 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.