Spectroscopic properties and energy transfer of Nd^3＋/Ho^3＋-doped Ga_2O_3-GeO_2 glass by codoping Yb^3＋ ion

• Published in: 中国稀土学报：英文版 Vol. 34; no. 4; pp. 368 - 373
• Main Author: 石冬梅 赵营刚
• Format: Journal Article
• Language: English
• Published: 2016
• Subjects: 光谱性质; 共掺杂; 差示扫描量热分析; 激光二极管; 玻璃体系; 离子; 能量转移
• ISSN: 1002-0721; 2509-4963

This study presented the luminescence properties of Nd^3＋/Yb^3＋/Ho^3＋ dopant ions inside a host based on Ga_2O_3-GeO_2-Li_2O（GGL） glass. The measured differential scanning calorimetry result showed that GGL glass exhibited excellent stability against devitrification with ？T=135 oC. Obvious 543 and 657 nm emissions were observed in Nd^3＋/Ho^3＋-codoped sample. The incorporation of Yb^3＋ into Nd^3＋/Ho^3＋-codoped glass system had resulted in enhanced upconversion emission intensity under the excitation of 808 nm and/or 980 nm laser diode（LD）. The possible mechanisms and related discussions on this phenomenon were presented. It was noted that the presence of Yb^3＋ yielded an enhancement about 7 and 11 times in the 543 and 657 nm emission intensities respectively under 808 nm excitation due to the energy transfer from Nd^3＋ to Ho^3＋ via Yb^3＋ ion. Here Yb^3＋ played a major role as a bridging ion. While enhanced 543 and 657 nm emission intensities under the excitation of 980 nm LD originated from the sensitization effect of Yb^3＋. Our results showed that Nd^3＋/Ho^3＋/Yb^3＋ triply doped GGL glass might be a promising candidate for the development of visible-laser materials.