Structure and spectroscopic properties of germanium dioxide doped phosphate glasses

Abstract Germanium dioxide ( GeO 2 )-doped phosphate glasses with large gain coefficient and systematical factor (SFL) were prepared by high temperature melting for laser glass applications. Their physical parameters and optical properties were investigated such as glass transition temperature (Tg), density, Raman spectra, fluorescence emission spectra, decay cure and absorption spectra. Compared with the traditional phosphate glass, the introduction of GeO 2 to phosphate glass results in a high fluorescent intensity and a long lifetime. All these advantages might mean that GeO 2 -doped phosphate glasses are a promising candidate as a gain medium for ultra-fast and high-power laser.