Controlling the Spectral Characteristics of Bismuth Doped Silicate Glass Based on the Reducing Reaction of Al Powder

Silicate glasses co-doped with Al metal powder and Bi₂O₃ are prepared. The effects of Al on spectral properties of samples are studied. It is found that the absorption intensity increases with increasing Al concentration in bismuth doped silicate glasses. The near-infrared (NIR) emission of the samples can be controlled by Al powder concentration no matter whether or not excited by 808 nm or 976 nm lasers. Furthermore, the influence of Al on formation of Bi-NIR active ions is discussed. The dependence relationship between the emission property of ～416 nm and Al concentration is a way to investigate the NIR emission origin of bismuth doped glass.