Effects of Rare Earth Dopants on Spectroscopic Properties of Silica Glasses Prepared by Sol-Gel Technique

Abstract

In this work, the effects of doping of silica glasses with rare earth element on their spectroscopic properties were studied. The silica glass monoliths were prepared by sol-gel technique and the doping process was carried out using different molar concentrations of aluminum and rare earth element (erbium). Results showed that the positions of the absorption bands in sol and bulk phases are similar to that of RE solutions, indicating the presence of RE3+ ions and its spectroscopic activity within the sample structure. It has also been noted that the present absorption spectra show inhomogeneous broadening which may be attributed to the amorphous character of sol-gel glass host.