Transmission and Absorption Properties in the Novel Ultra-optical TiO2- Bi2O3-PbO Glass System

Glasses with ultra-optical properties are most favored in all-optical communication devices, e.g. switches. Heavy polarizable Bi2O3 and PbO, in their high contents, have achieved the most high index of refraction and dispersion in oxide glasses, particularly in cooperation with relatively heavy glass conditional former, such as, TiO2. In this research, transmission and absorption properties of novel TiO2-Bi2O3-PbO (TBP) glass system were characterized by the spectrophotometry techniques in the near infera-red (2.5-10 µm) and ultraviolet/visible (0.25-1 µm) regions. The corresponding traces were explored with respect to the glass compositions. The Taus plot (method) was executed for the absorption coefficient (attenuation) measurements, and the subsequent related predictions in the uv/visible regions. Results indicated that TBP glasses claimed relatively appreciable absorption around, 7µm due to Ti-O bonds. Addition of TiO2 shifted transmission cut off and the related absorption peaks to higher wavelengths and broadened the absorption region. In the uv/visible region, addition of TiO2, as a conventional glass former, widened the transmission window in all by shifting attenuation to shorter wavelengths, where steeper absorption tails were observed. The overall attenuation in TBP glasses were more affected by Bi2O3 than PbO.