Er^(3+)/Yb^(3+)/Tm^(3+)/Pr^(3+)共掺碲酸盐玻璃超宽带近红外发光性能研究

Ultra-wideband near-infrared emission of Er^(3+)/Yb^(3+)/Tm^(3+)/Pr^(3+)codoped tellurite glass

采用熔融淬火技术制备了0.2mol%Er_(2)O_(3)、1mol%Yb_(2)O_(3)、0.1mol%Tm_(2)O_(3)和x mol%Pr_(6)O_(11)(x=0.25、0.3、0.35和0.4)掺杂的65TeO_(2)-15ZnO-10Na_(2)O-10WO_(3)系碲酸盐玻璃,通过X射线衍射(X-ray diffraction,XRD)、差热扫描曲线(differential scanning calorimetry,DSC)对玻璃样品的抗析晶性和热稳定性进行了表征。结果表明,玻璃样品具备良好的抗析晶性,析晶温度和转变温度差值为140℃,具有较好的热稳定性。吸收光谱结果显示,Er^(3+)/Yb^(3+)/Tm^(3+)/Pr^(3+)共掺碲酸盐玻璃在980nm处有较强的吸收峰,故可以采用980nm泵浦源对该玻璃样品进行激发。在1200—2000nm近红外波段范围,玻璃样品存在峰值中心为1.35μm、1.53μm和1.8μm 3个波段发射峰,且3个发射峰的荧光半高宽(full width at half maxima,FWHM)均大于100nm,其覆盖了光信号传输的E、S、C和C+L 4个波段,大幅度地提高了掺铒光纤放大器(erbium doped fiber amplifier,EDFA)的放大带宽。

The 65 TeO_(2)-15 ZnO-10 Na_(2)O-10 WO_(3)series tellurite doped with 0.2 mol%Er_(2)O_(3),1 mol%Yb_(2)O_(3),0.1 mol%Tm_(2)O_(3),and x mol%Pr_(6)O_(11)(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 Er^(3+)/Yb^(3+)/Tm^(3+)/Pr^(3+)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 1200—2000 nm,the glass sample has three emission peaks of 1.35μm,1.53μm and 1.8μm,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).