Abstract
Ho3+/Yb3+ co-doped tellurite–germanate glasses with lower phonon energy (771 cm−1) were prepared by conventional melt-quenching method. The prepared samples were characterized by emission spectra, differential scanning calorimeter (DSC) curve, X-ray diffraction (XRD) pattern, and Raman spectra. The DSC curve shows that the sample has a good thermal stability, in which the ΔT is 202 °C. Compared to the recently reported tellurite glasses, the ΔT was increased by approximately 24%. Under the 980 nm laser excitation, it was found that the full width at half maximum (FWHM) of the sample at 2.0 µm was 190 nm. Compared with the reported glasses for this type, the value was effectively improved. Meanwhile, the FWHM of the sample at 4.1 µm was 285 nm, which has not been reported yet. This indicates that Ho3+/Yb3+ co-doped tellurite–germanate glass has a great application prospect in mid-infrared broadband fiber amplifiers.
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This work is supported by the National Natural Science Foundation of China (61604094).
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Hou, G., Zhang, C., Li, G. et al. 2.0-µm and 4.1-µm mid-infrared broadband emission enhancement in Ho3+/Yb3+ co-doped tellurite–germanate glasses. J Mater Sci: Mater Electron 31, 2057–2062 (2020). https://doi.org/10.1007/s10854-019-02725-8
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DOI: https://doi.org/10.1007/s10854-019-02725-8