Abstract
In order to develop promising materials for the Er3+-doped fiber amplifier, transparent glass ceramics containing hexagonal CeF3 nanocrystals were prepared by melt-quenching and subsequent heating. The obvious Stark splitting in the absorption and emission spectra, the intensification of the 1.53 μm emission, and the prolongation of the Er3+:I413/2 decay lifetime demonstrated the partition of Er3+ ions into the CeF3 nanocrystals. Evidently, the efficient cross-relaxation between Ce3+ and Er3+, i.e., Er3+:I411/2+Ce3+:F25/2→Er3+:I413/2Ce3+:F27/2 led to the quenching of the upconversion and the enhancing of the desired Er3+ 1.53 μm emission. Based on the emission and absorption spectra, it was further calculated that the glass ceramic possesses broad bandwidth as that of the ZBLAN glass, and large emission cross-section close to the silicate glass, for the 1.53 μm emission.
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