Structure and spectroscopic properties of Er3+/Ce3+ co-doped TeO2-Bi2O3-TiO2 glasses modified with various WO3 contents for 1.53 μm emission
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Abstract:
The Er3+/Ce3+ co-doped tellurite-based glasses (TeO2-Bi2O3-TiO2) modified with various WO3 contents are prepared using conventional melt-quenching technique. The X-ray diffraction (XRD) patterns and Raman spectra of glass samples are measured to investigate the structures. The absorption spectra, the up-conversion emission spectra, the 1.53 μm band fluorescence spectra and the lifetime of Er3+:4I13/2 level are measured, and the amplification quality factors of Er3+ are calculated to evaluate the effect of WO3 contents on the 1.53 μm band spectroscopic properties. With the introduction of WO3, it is found that the prepared tellurite-based glasses maintain the amorphous structure, while the 1.53 μm band fluorescence intensity of Er3+ is improved evidently, and the fluorescence full width at half maximum (FWHM) is broadened accordingly. In addition, the prepared tellurite-based glass samples have larger bandwidth quality factor than silicate and germanate glasses. The results indicate that the prepared Er3+/Ce3+ co-doped tellurite-based glass with a certain amount of WO3 is an excellent gain medium applied for the 1.53 μm band Er3+-doped fiber amplifier (EDFA).
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This work has been supported by the National Natural Science Foundation of China （No.61178063）, the Graduate Innovative Scientific Research Project of Zhejiang Province （No.YK2010048）, the Scientific Research Foundation of Graduate School of Ningbo University （No.G 13035）, and the K. C. Wong Magna Fund and Hu Lan Outstanding Doctoral Fund in Ningbo University.
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