Mid-infrared fluorescence properties, structure and energy transfer around 2 µm in Tm 3+ /Ho 3+ co-doped tellurite glass
Mid-infrared fluorescence properties, structure and energy transfer around 2 µm in Tm 3+ /Ho 3+ co-doped tellurite glass
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DOI：
10.1016/j.jlumin.2017.09.052
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发表时间：
2018-02
影响因子：
3.6
通讯作者：
Caizhi Wang;Ying Tian;Xinyu Gao;Qunhuo Liu;F. Huang;Bingpeng Li;Junjie Zhang;Shiqing Xu
中科院分区：
文献类型：
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作者：
Caizhi Wang;Ying Tian;Xinyu Gao;Qunhuo Liu;F. Huang;Bingpeng Li;Junjie Zhang;Shiqing Xu
制备了热稳定性好、声子能量低的Tm ~（3+）/Ho ~（3+）掺杂碲酸盐玻璃。1.8在Tm 3 +/Ho 3+共掺杂玻璃中观察到了μm荧光、增强的近2 μm荧光和弱的2.3 μm荧光。根据Tm ~（3+）和Ho ~（3+）的吸收光谱、发射光谱和能级结构，分析了Tm ~（3+）和Ho ~（3+）之间的能量转移机理。Tm ~（3+）/Ho ~（3+）共掺碲酸盐玻璃中1.8 μm和2 μm荧光的衰减寿命分别为0.38 ms和2.46 ms。计算并比较了Tm ~（3+）：3F_4和Ho ~（3+）：5I_7能级间的能量转移效率。另外，计算的正向能量传递系数CTm-Ho大约是反向能量传递系数CHo-Tm的五倍。结果表明，Tm 3 +/Ho 3+掺杂碲酸盐玻璃具有优异的光谱性能，是一种有吸引力的2 μm激光候选材料。
Tm3+/Ho3+doped tellurite glasses with good thermal stability and low phonon energy are prepared. 1.8 µm fluorescence, enhanced near 2 µm fluorescence and a weak 2.3 µm 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 µm and 2 µm fluorescence in Tm3+/Ho3+co-doped tellurite glass are 0.38 ms and 2.46 ms, respectively. Moreover, the energy transfer efficiency between Tm3+:3F4and Ho3+:5I7levels is calculated and compared. Additionally, the calculated forward energy transfer coefficient CTm-Hois 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 µm laser.