Abstract
TeO2 based glasses are known to have high third-order optical nonlinear properties and are expected as nonlinear optical devices. In the present study, we fabricated Ag2O-TeO2 glasses and Ag2O-Nb2O5-TeO2 glasees, and then estimated their structures and optical properties. The main results showed that the absorption-edge of the glasses was shifted to long-wavelength side with increasing Ag2O contents. From Raman spectroscopy, it was found that increasing Ag2O contents promoted to change TeO4 to TeO3/TeO3+1 units. X-ray photoelectron spectroscopy (XPS) data revealed the presence of an electronic state of Ag2+ ions, which could have a large influence on the absorption-edge wavelength.
