Abstract
A highly Dy3+ doped (10 mol%) fluoroaluminate glass was successfully fabricated by melt-quenching method for the first time. The intensity of 2.86- $\mu \text{m}$ emission increases with the Dy3+ ions concentration without fluorescence quenching because of the large dispersibility of Dy3+ ions in this glass network without clustering. Radiative and emission parameters were calculated based on the Judd–Ofelt theory, which show that the 10 mol% highly doped sample possesses a high calculated spontaneous transition probability (32.01 $\text{S}^{-1}$ ) together with a large emission cross section ( $5.94 \,\, \times \,\, 10^{-21}$ cm2) of Dy3+: $^{6}\text{H}_{13/2}\to ^{6}\text{H}_{15/2}$ transition. In addition, the increasing $\Omega _{t}$ ( $t=2$ ,4,6) values, which caused by a complex outermost electron configuration of Dy3+ ions, have been further discussed to analyze the partial glass structure.
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