Dependence of Thermodynamic and Optical Properties on Glass Compositions in Low-phonon Energy Heavy-metal Gallate Glass System

摘要

Dependence of thermodynamic and optical properties on glass compositions in lowphonon energy heavy-metal gallate (MHG) glass system has been investigated. With the increase of Ga_2O_3 and the decrease of Bi_2O_3, temperature difference value (△T) of Ho~(3+)-doped MHG glasses is increased from 68°C to 98°C, in the meantime, thermal stability parameter (H) is enhanced from 0.224 to 0.263, and Saad-Poulain criterion (S) is heightened from 5.59°C to 13.17°C. The increments of thermal parameters indicate that the thermal stability against crystallization can be improved for potential optical fiber drawing. The blue shift of cut-off wavelength is confirmed due to the adjustment of glass compositions, which broadens the visible transmittance window, indicating that more options of blue and green excitation light sources make MHG glasses promising candidates for developing functional optoelectronic devices.