Structure and spectroscopic properties of Er³⁺/Ce³⁺ co-doped TeO₂-Bi₂O₃-TiO₂ glasses modified with various WO₃ contents for 1.53 μm emission

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⁺:⁴I_13/2 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).

Keywords

Band Fluorescence / Excited State Absorption / Tellurite Glass / Germanate Glass / Band Fluorescence Emission

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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.G13035), and the K. C. Wong Magna Fund and Hu Lan Outstanding Doctoral Fund in Ningbo University.