The effect of phosphorus oxide additives on spectral-optical characteristics of silicate glass

The effect of small additions of phosphorus oxide on the optical transmission of silicate glasses in the visible and near-IR regions has been studied. It is shown that an increase in the phosphorus concentration is accompanied by an increase in absorption in the IR region, which is due to an increase in the relative content of ferrous iron and its possible transition to octahedral coordination. The increase in absorption in the visible region is insignificant and cannot become an obstacle for doping industrial silicate glasses with phosphorus. Tab. 1, ill. 2, bibliography: 6 titles.