Abstract
In this article, NaPO3-BaF2-AlF3-CaF2 glasses doped with Eu3+ and Tb3+ were manufactured by conventional melt-quenching method, and they showed good physical properties throughout various measurements: density, refractive index, Raman scattering, and X-ray diffraction (XRD). Basing on Judd-Ofelt theory, the Ω2/4/6 values were calculated. The higher Ω2 values of the Eu3+-doped fluorophosphate glasses indicate a highly polarized environment around Eu3+ ions. Accompanying with the Eu3+ and Tb3+ dual-doped glass, it showed that the response of excitation absorption extended by whole UVA region. This phenomenon was explained by the energy transferring between Eu3+ and Tb3+. Combining the dual-doped glass with silicon-based photodetectors, the spectral response of the detectors in the UVA region was improved up to 20%.
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