Efficient methods of obtaining good optical properties in Yb-Bi co-doped phosphate glasses

Abstract

Yb-Bi co-doped phosphate glasses were prepared by a melt-quenching technique. The effects of B₂O₃, Al₂O₃ and Y₂O₃ addition on the absorption spectra, broadband emission intensity and measured fluorescence lifetime were investigated. The results have shown that a certain amount of B₂O₃, Al₂O₃ and Y₂O₃ addition was highly efficient for enhancing the near-infrared (NIR) luminescence. Using the NIR emission spectra and the measured fluorescence lifetime, full width at half maxima (FWHM) and stimulated emission cross-section (σ_em) were evaluated. The results indicate B₂O₃, Al₂O₃ and Y₂O₃ can be introduced into the Yb-Bi co-doped phosphate glass matrix to obtain good optical properties.