Abstract

The infrared absorption spectra of six Na₂O-TiO₂-SiO₂ glasses in the frequency range of 1600 to 200 cm⁻¹ are reported. These glasses, having a SiO₂/Na₂O molar ratio of 1.67 to 3.54, and containing 20 or 25 mole % TiO₂, demonstrate two main absorptions at ~950 cm⁻¹ and at ~450 cm⁻¹. A weak absorption at ~790 cm⁻¹ becomes progressively weaker in intensity, and a weak shoulder at 1050 cm⁻¹ appears with increasing Na₂O content. The frequency of the absorption band at ~950 cm⁻¹ is found to decrease markedly and systematically with a decrease in the SiO₂/Na₂O molar ratio, whereas the frequency of the band at ~450 cm⁻¹ shows a slight increase. The infrared results may be interpreted in terms of a lowering of symmetry occurring for the SiO₄ units. The effect of TiO₂ content on the relationship between vibrational frequency is discussed. The frequency composition curves for glasses containing 20 and 25 mole % of TiO₂ intersect at SiO₂/Na₂O ratio ~2. A reversal in the frequency vs SiO₂/Na₂O ratio relation was also found at SiO₂/Na₂O ~2 for the sodium silicate glasses.

TiO₂–SiO₂ based glasses for infrared hollow waveguides

Nobuhiro Nagano, Mitsunori Saito, Mitsunobu Miyagi, Nobuyoshi Baba, and Naruhito Sawanobori
Appl. Opt. 30(9) 1074-1079 (1991)

Diffusion in binary TiO₂-SiO₂ glasses

Johannes Kirchhof, Sonja Unger, Jan Dellith, and Andy Scheffel
Opt. Mater. Express 4(4) 672-680 (2014)

High Verdet constant of Tb₂O₃-doped TiO-B₂O₃-Al₂O₃-Na₂O magneto-optical glass

Jiadong Li, Xudong Zhao, Yuanxing Chang, Weiwei Li, Ping Lu, Mengling Xia, Xianghua Zhang, and Yinsheng Xu
Opt. Express 32(9) 16506-16513 (2024)

Bragg gratings in ternary SiO₂:SnO₂:Na₂O optical glass fibers

G. Brambilla, V. Pruneri, L. Reekie, C. Contardi, D. Milanese, and M. Ferraris
Opt. Lett. 25(16) 1153-1155 (2000)

Self induced gratings in ternary SiO₂:SnO₂:Na₂O bulk glasses by UV light seeding

M. Lancry, M. Douay, P. Niay, F. Beclin, Y. Menke, D. Milanese, M. Ferraris, and B. Poumellec
Opt. Express 13(18) 6878-6886 (2005)