Alkali-silicate glass doped with dysprosium oxide was prepared and investigated. Recycled window glass (RWG) was substituted with pure SiO2 chemical as starting material. Physical properties of the glass samples such as density, molar volume and ion concentrations were determined. The thermoluminescence properties such as sensitivity and linearity of the glass samples were investigated. Trap depth parameters were studied using the glow curve shape method. Moreover, the optical absorption of the glass samples was studied with the transition mechanisms of Dy3+ ions.