Optical property of BTG55 glasses prepared at different melt temperature

Abstract

We have examined correlation between the melt temperature of 30BaO-15TiO2-55GeO2 (BTG55) glass and the optical property. Refractive index and absorption coefficient of the BTG55 glasses increased with increasing melt temperature. Activation energy for refractive index change of the BTG55 glass shows that the observed difference originates from the micro-structure in the glass, such as defects