掺Er^(3+)氟铅硅酸盐玻璃的光谱性质和热稳定性研究

Spectroscopic Properties and Thermal Stability of Er^(3+)-Doped FluorideLead Silicate Glasses

制备了掺Er^(3+)氟铅硅酸盐玻璃,研究了玻璃的物理性质、热稳定性、吸收光谱、荧光光谱和荧光寿命.应用McCumber理论,计算了能级4I13/2→4I15/2跃迁的吸收和受激发射截面.结果表明:以PbF_2等分子替代:PbO含量,样品密度、折射率、热稳定性、吸收截面和受激发射截面降低,但荧光半高宽和荧光寿命增加.对Er^(3+)离子在不同玻璃基质中带宽特性的比较发现,Er^(3+)掺杂50SiO_2-50PbF_2玻璃的带宽特性与碲酸盐和铋酸盐玻璃相当,大于磷酸盐,锗酸盐和硅酸盐玻璃,表明掺Er^(3+)氟铅硅酸盐玻璃可作为宽带光纤放大器的基质材料.

Er3+-doped fluoride lead silicate glasses were fabricated. The physical properties, thermal properties, absorption spectra, fluorescence spectra and fluorescence lifetimes of the samples were investigated. The absorption and stimulated emission cross-sections of I-4(13/2) -->(4) I-15/2 transition of the samples were calculated by McCumber-theory. The results show that densities, refractive indices, thermal stability, absorption and stimulated emission cross-sections of the samples decrease, but the fluorescence full width at half max maximum and fluorescence lifetimes of the I-4(13/2) level of Er3+ increase. Compared with other glass hosts, the gain bandwidth property of Er3+-doped 50SiO(2)-50PbF(2) glass is close to those of tellurite and bismuth glasses, and has advantage over those of silicate, phosphate and germante glasses, which shows that Er3+-doped fluoride lead silicate glasses can be as host materials for broadband optical amplifier.