Investigation on Preparation and Fluorescence Properties of Oxy-Fluoride Glass Co-Doped with Er~(3+) and Yb~(3+)

摘要

The glass sample based on the composition of 45PbF_2-45GeO_2-10WO_3 co-doped with Yb~(3+)/Er~(3+) was prepared by the fusion method in two steps: melted at 950 deg C for 20 approx 25 min then annealed at 380 deg C for 4 h. Through the V-prism it is found that the refractive index of host glass and the sample are 1.517 and 1.65 respectively. The transmittance was observed by using the ultraviolet-visible-infrared spectrometer in the wavelength range from 0.35 to 2. 5 mu n. The transmittance of the host glass is beyond 73 percent. That of the sample is beyond 50 percent and there are characteristic absorption peaks of rare-earth ions. The emission spectrum was measured by using the Hitachi F-4500 fluorescent spectrometer pumped by 980 nm semiconductor laser. There are a strong emission peak at 530 nm and a weak peak at 650 nm.