Er³⁺/Yb³⁺/Tm³⁺/Pr³⁺共掺碲酸盐玻璃超宽带近红外发光性能研究

The 65TeO₂-15ZnO-10Na₂O-10WO₃ series tellurite doped with 0.2 mol% Er₂O₃, 1 mol% Yb₂O₃, 0.1 mol% Tm₂O₃, and x mol% Pr₆O₁₁ (x=0.25, 0.3, 0.35 and 0.4) are prepared by melt quenching technology. The glass sample is characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) curve to characterize the crystallization resistance and thermal stability. The results show that the glass sample has good crystallization resistance, the difference between crystallization temperature and transition temperature is 140 ℃, and has good thermal stability. The absorption spectrum results show that the Er³⁺/Yb³⁺/Tm³⁺/Pr³⁺ codoped tellurite glass has a strong absorption peak at 980 nm, so the glass sample can be excited by a 980 nm pump source.In the near-infrared range of 1 200-2 000 nm, the glass sample has three emission peaks of 1.35 μm, 1.53 μm and 1.8 μm, and the full width at half maxima (FWHM) of the three emission peaks is greater than 100 nm, which covers the four wavebands of E, S, C and C+L for optical signal transmission, and greatly increased the amplification bandwidth of erbium doped fiber amplifier (EDFA).