Spectroscopic Properties of Nd^(3+)-Doped High Silica Glass Prepared by Sintering Porous Glass

摘要

A new kind of Nd 3+ -doped high silica glass （SiO2>96% （mass fraction）） was obtained by sintering porous glass impregnated with Nd 3+ ions. The absorption and luminescence properties of high silica glass doped with different Nd 3+ concentrations were studied. The intensity parameters Ωt （t=2, 4, 6）, spontaneous emission probability, fluorescence lifetime, radiative quantum efficiency, fluorescence branching ratio, and stimulated emission cross section were calculated using the Judd-Ofelt theory. The optimal Nd 3+ concentration in high silica glass was 0.27% （mole fraction） because of its high quantum efficiency and emission intensity. By comparing the spectroscopic parameters with other Nd 3+ -doped oxide glasses and commercial silicate glasses, the Nd 3+ -doped high silica glasses are likely to be a promising material used for high power and high repetition rate lasers.