ABSTRACT
Linear and nonlinear refractive indices for oxide and nonoxide-tellurite glasses and glass-ceramics (bulk and thin-‡lm) are discussed in Chapter 8, along with experimental measurements of optical constants in these glasses. The refractive indices and dispersion values at different frequencies and temperatures are summarized for most tellurite glasses, together with new data. Re¦ection, absorption, and scattering are related to dielectric theory. The relationship between refractive indices and numbers of ions/unit volume (N/V) is explored, along with the values of polarizability. The reduced N/V of polarizable ions is primarily responsible for reductions in both the dielectric constant and refractive indices, although reductions in electronic polarization also affect optical properties. Data on reductions in refractive indices, densities, and dielectric constants that occur with halogen substitution are also discussed, along with thermal luminescence, ¦uorescence, phonon sideband spectra, and optical applications of tellurite glasses.
