| Tm3+/Er3+/Ho3+共掺SiO2-Bi2O3-AlF3-BaF2玻璃发光性能 |
| Spectroscopic Properties of Tm3+/Er3+/Ho3+ Co-doped SiO2-Bi2O3-AlF3-BaF2 Glasses |
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| 摘要: 采用高温熔融法制备了Tm3+/Er3+/Ho3+共掺的铋硅酸盐50SiO2-40Bi2O3-5AlF3-5BaF2玻璃。研究了在808 nm激光器（Laser Diode）激发下Tm3+/Er3+/Ho3+共掺的铋硅酸盐在2 060 nm处的发光性能，同时测试及分析了该铋硅酸盐玻璃的差热特性、吸收光谱及荧光光谱。根据吸收光谱以及Judd-Oflet理论，计算了Ho3+的Judd-Oflet强度参数Ωt（t=2，4，6）以及Tm3+/Er3+/Ho3+相应的吸收截面。铋硅酸盐玻璃中，Tm2O3、Er2O3和Ho2O3掺杂浓度分别为0.75%、1.0%和0.5%时，2 060 nm处Ho3+∶5I7→5I8发射峰强度达到最大。对Tm3+/Er3+/Ho3+3种离子的光谱性质和离子间可能存在的能量传递也做了分析。Ho3+在1 953 nm处的最大吸收截面σabs为9.08×10-21 cm2，在2 060 nm处的最大发射截面σem为1.168×10-20 cm2，辐射寿命τmea为2.75 ms，具有良好的增益效应σemτ（3.212×10-20 cm2·ms）。 |
| 关键词: 光学 2 μm发光 Tm3+/Er3+/Ho3+共掺 铋硅酸盐玻璃 |
| 基金项目: |
| Abstract: The Tm3+, Er3+ and Ho3+ co-doped bismuth silicate glasses 50SiO2-40Bi2O3-5AlF3-5BaF2 were prepared by high-temperature melt-quenching method. The spectroscopic properties of Tm3+, Er3+ and Ho3+ co-doped bismuth silicate at 2 060 nm exited by 808 nm Laser Diode were investigated. Thermal stability of the glasses, absorption spectra and fluorescence spectra of the Tm3+, Er3+ and Ho3+ co-doped glass samples were measured. According to the absorption spectrum and Judd-Oflet theory, the Judd-Oflet intensity parameters of Ho3+ Ωt(t=2, 4, 6), absorption cross sections of Tm3+, Er3+ and Ho3+ were calculated, respectively. The measured fluorescence spectra manifest that the maximal emission intensity of Ho3+:5I7→5I8 at 2 060 nm can be achieved at the concentration of 0.75% Tm2O3, 1.0% Er2O3 and 0.5% Ho2O3 in bismuth silicate glasses. Besides the spectroscopic properties of Tm3+, Er3+ and Ho3+ separately and possible energy transfer mechanisms among Tm3+, Er3+ and Ho3+ were analyzed and discussed in detail. The maximal absorption and emission cross sections of Ho3+ are 9.08×10-21 cm2 at 1 953 nm and 1.168×10-20 cm2 at 2 060 nm, respectively, with a lifetime of 2.75 ms, while large σemτ achieved (3.212×10-20 cm2·ms) suggesting its efficient application in 2 μm fiber lasers. |
| Keywords: optics 2.0 μm emission Tm3+/Er3+/Ho3+co-doped bismuth silicate glass |
| 投稿时间：2016-10-09 修订日期：2017-03-01 |
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| 厉宇翔,邓声玉,范亚蕾,王德强.Tm3+/Er3+/Ho3+共掺SiO2-Bi2O3-AlF3-BaF2玻璃发光性能[J].无机化学学报,2017,33(5):801-808. |
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