掺Er^(3+)氟铅硅酸盐玻璃的光谱性质和热稳定性研究

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.

掺镱氟铅硅酸盐玻璃光谱性质研究

采用高温熔融法制备了组成为(80-x)SiO2.xPbO.(17～19)(R2O+RF).(1～3)Yb2O3(R=Li、Na、K)(mol%)的掺镱氟铅硅酸盐玻璃,测量了样品的吸收光谱、荧光光谱和荧光寿命,利用McCumber理论计算了该玻璃系统中Yb3+离子2F5/2→2F7/2能级跃迁受激发射截面.结果表明,该玻璃在1013nm处的σemi为0.21×10-20cm2,荧光有效线宽为94.8nm,荧光寿命为2.36ms.激光性能评价结果表明,该玻璃是实现大能量超短脉冲激光的理想材料.

Optical waveguides in fluoride lead silicate glasses fabricated by carbon ion implantation

The carbon ion implantation with energy of 4.0 MeV and a dose of 4.0×10^(14) ions/cm^2 is employed for fabricating the optical waveguide in fluoride lead silicate glasses. The optical modes as well as the effective refractive indices are measured by the prism coupling method. The refractive index distribution in the fluoride lead silicate glass waveguide is simulated by the reflectivity calculation method(RCM). The light intensity profile and the energy losses are calculated by the finite-difference beam propagation method(FD-BPM) and the program of stopping and range of ions in matter(SRIM), respectively. The propagation properties indicate that the C^(2+) ion-implanted fluoride lead silicate glass waveguide is a candidate for fabricating optical devices.