Obtaining the spectroscopic quality factor through the luminescent thermometry in 50Li2O · 45B2O3 · 5Al2O3 glasses doped with Nd3+ and fluorides

Lithium-boron-aluminum (LBA) glasses doped with Nd3+ and fluorides were produced. From the absorption spectra, their Judd-Ofelt intensity parameters, Ω2,4,6, and spectroscopic quality factors were calculated. Exploiting their near infrared temperature dependent luminescence, we investigated their potential for optical thermometry based on the luminescence intensity ratio (LIR) methodology. Three LIR schemes were proposed, and relative sensitivity values up to 3.57±0.06%K-1 were obtained. From the temperature dependent luminescence, we alternatively calculated their corresponding spectroscopic quality factors. The results indicated that Nd3+-doped LBA glasses are promising systems for optical thermometry and as gain mediums for solid-state lasers.