Fluoride-oxide Glass for High Efficiency Upconversion from IR to Green

In this paper, the fluoride-oxide glass doped with Er³⁺ for upconversion from IR to green was report. The component of sample in experiment is 60TeO₂-8PbF₂-10AlF₃-10BaF ₂-10NaF-2ErO_3/2, and the prepared method is obtained.The absorption spectrum was measured at room temperature. Intense green upconversion emissions from Er³⁺ doped the sample were observed under 808 nm and 970 nm excitation, and the upconversion emissions spectra under 808 nm and 970 nm LD excitation were measured at room temperature. The upconversion mechanics was discussed. The relationship between working currents of LD and intensity of upconversion emissions has been studiet. The result was improved that needs of two photons for upconversion process under 808 nm and 970 nm excitation respectively.