Mid-infrared fluorescence properties, structure and energy transfer around 2 μm in Tm3+/Ho3+ co-doped tellurite glass

作者：Wang, Caizhi; Tian, Ying^*; Gao, Xinyu; Liu, Qunhuo; Huang, Feifei; Li, Bingpeng; Zhang, Junjie; Xu, Shiqing

来源：Journal of Luminescence, 2018, 194: 791-796.

DOI：10.1016/j.jlumin.2017.09.052

• 2 mu m emission
• Tm3+/Ho3+
• Tellurite glass
• Energy transfer
• Micro-parameters

Tm3+/Ho3+ doped tellurite glasses with good thermal stability and low phonon energy are prepared. 1.8 mu m fluorescence, enhanced near 2 mu m fluorescence and a weak 2.3 mu m fluorescence are observed in the Tm3+/Ho3+ co-doped glasses. The energy transfer mechanism between Tm3+ and Ho3+ has been analyzed according to the absorption spectra, the emission spectra and the level structures of Tm3+ and Ho3+ ions. The decay lifetime of 1.8 mu m and 2 mu m fluorescence in Tm3+/Ho3+ co-doped tellurite glass are 0.38 ms and 2.46 ms, respectively. Moreover, the energy transfer efficiency between Tm3+:F-3(4) and Ho3+:I-5(7) levels is calculated and compared. Additionally, the calculated forward energy transfer coefficient CTm-Ho is about five times as large as the reverse energy transfer coefficient CHo-Tm. Results demonstrate that the Tm3+/Ho3+ doped tellurite glass has excellent spectroscopic properties and can be an attractive candidate for 2 mu m laser.

• 出版日期2018-2
• 单位中国计量大学