Temperature and wavelength dependence of the thermo-optical properties of tellurite and chalcogenide glasses

Abstract

The refractive index and the temperature coefficient of the optical path length change of tellurite ͑80TeO 2 : 20Li 2 O͒ and chalcogenide glasses ͑72.5Ga 2 S 3 : 27.5La 2 O 3 ͒ were determined as a function of temperature ͑up to 150°C͒ and wavelength ͑in the range between 454 and 632.8 nm͒. The tellurite glass exhibits the usual refractive index dispersion in the wavelength range analyzed, while anomalous refractive index dispersion was observed for the chalcogenide glass between 454 and 530 nm. The dispersion parameters were determined by means of the single-effective oscillator model. In addition, a strong dependence of the temperature coefficient of the optical path length on the photon energy and temperature was found for the chalcogenide glass. The latter was correlated to the shift of the optical band gap ͑or electronic edge͒ with temperature, which was interpreted by the electron-phonon interaction model.

Relation among optical, thermal and thermo-optical properties and niobium concentration in tellurite glasses

“…Furthermore, TeO 2 -based glasses possess a large optical nonlinearity, hence rendering these materials as very promising candidates for different applications in photonics [2,3]. Nowadays, the technology in optical fibers based on tellurite glasses is a reality, justifying the progressive investigations of structural [4,5], optical [6,7], and thermo-optical [8] properties.…”

Engineering of TeO2-ZnO-BaO-Based Glasses for Mid-Infrared Transmitting Optics

“…The thermo-optic coefficient (CTE, α) is a vital parameter for the realization of several practical optical systems [55]. The α can lead to stress-optic effects and also influences the thermo-optic coefficient, dn/dT of glass [56][57][58]. The dilatometer was used for measuring the dilatometric traces of titled glasses in order to obtain the properties like dilatometric glass transition temperature (T dg ), dilatometric softening temperature (T ds ) and α.…”

Recent Advances in Amorphous Semiconductors—A Correlative Study on Se-Based Metallic Chalcogenide Alloys

“…Skoug et al 67 have studied the effect of structure on thermal conductivity of metallic chalcogenide glasses. Silva et al 68 have studied the temperature dependence thermo-optical properties of metallic chalcogenide glasses. Hu et al 69 have reported the structural, electrical and optical properties of Cu doped chalcogenide glasses.…”