REFRACTIVE-INDEX MEASUREMENT OF THE TEX GLASSES

Refractive index measurements have been performed as a function of wavelength and as a function of temperature for different tellurium halide based glasses (the TeX glasses). The dispersion properties have been discussed and compared with chalcogenide glasses. It has been indicated that a small modification of the glass composition can lead to an important change of the refractive index. These results are interesting for the design of fibres having a core-cladding structure. As far as the dn/dT is concerned, this thermal-optical parameter is almost the same for different glasses in the same family.