Abstract
We describe the preparation and some optical properties of high
refractive index TeO2-PbO-TiO2 glass system. Highly homogeneous glasses
were obtained by agitating the mixture during the melting process in an
alumina crucible. The characterization was done by X-ray diffraction,
Raman scattering, light absorption and linear refractive index
measurements. The results show a change in the glass structure as the
PbO content increases: the TeO4 trigonal bipyramids characteristics of
TeO2 glasses transform into TeO3 trigonal pyramids. However, the
measured refractive indices are almost independent of the glass
composition. We show that third-order nonlinear optical susceptibilities
calculated from the measured refractive indices using Lines' theoretical
model are also independent of the glass composition.
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