摘要：目前,通过常规熔融淬火法制备了具有与Er3+和Tm3+离子共掺杂的无铅铋硅酸盐玻璃，组成是64SiO2-15Bi2O3-5TiO2·8Na2O-8Li2O（摩尔比）。Er3+和Tm3+离子的Judd-Ofelt强度参数相似表明，两种稀土离子都具有相同的配位体环境。考察了使用808nm和1550nm激光二极管来检测中红外发射特性。结果表明当浓度比Er：Tm=4:1时，共掺样品具有最高发射强度。利用McCumber理论计算了样品的吸收和受激发射截面，结果表明，铒铥共掺样品的2μm发射截面可达8。1×10-21cm2。采用Dexter-Foster理论分析了Er3+、Tm3+之间的能量传递机制，结果表明Er3+离子4I13/2至Tm3+：3F4能级有较大的能量传递微观系数。以上研究结果表明，铒铥共掺铋硅玻璃是一种良好的中红外激光器潜在激光材料。80892

关键词： 铋硅酸盐玻璃，Er3+/Tm3+共掺杂，2。0μm发光，1550nm泵浦

Study on the Spectroscopic Properties of Er/Tm Bismuth-doped Silicate Glass

Abstract：

    At present, lead-free bismuth silicate glass with co-doped with Er3+ and Tm3+ is prepared by conventional melt quenching method。 The composition is 64SiO2-15Bi2O3-5TiO2 • 8Na2O-8Li2O (molar ratio)。 Similar Judd-Ofelt strength parameters for Er3+ and Tm3+ ions indicate that both rare earth ions have the same ligand environment。 The use of 808nm and 1550nm laser diodes was used to detect mid-infrared emission characteristics。 The results show that when the concentration ratio Er: Tm = 4: 1, the co-doped sample has the highest emission intensity。 The results show that the emission profile of the erbium-thulium co-doped sample can reach 8。1×10-21cm2 in the 2μm emission section of the sample by McCumber's theory。 The energy transfer mechanism between Er3+ and Tm3+ was analyzed by Dexter-Foster theory。 The results show that the energy transfer microcosmic coefficients of Er3+ ions 4I13/2 to Tm3+: 3F4 have large energy transfer。 The above results show that erbium-thulium co-doped bismuth silica glass is a good medium-infrared laser latent laser material。

Keywords: Bismuth silicate glass, Er3+/Tm3+ co-doped, 2。0μm luminescence, 1550nm pump

目 录

目 录 3

1 引言 1

1。1稀土离子的光谱理论 1

1。2位于2μm发光荧光光谱玻璃综述 3

1。3 课题背景和意义 5

2 实验方法和理论基础 7

2。1 实验原料 7

2。2 样品制备 8

2。3试样表征 8

2。3。1 密度测试 8

2。3。2折射率 9

2。3。3光谱性质测试 9

2。4光谱理论-Judd-Ofelt理论 9

3 结果与讨论 10

3。1吸收光谱 10

3。2荧光光谱 11

3。2。1 808nm荧光光谱 11

3。2。2 1500nm光谱 12

3。3 能量转移机制 13

3。4 受激发射截面和宽带增益表征 15

3。5 荧光衰减谱 16

4 论文总结 17

致  谢 18

参考文献