Yb^3+含量对掺Er^3+铝酸盐玻璃光谱性质的影响

采用高温熔融法制备百分比为(100-x)(23.6Al2O3-53CaO-7.7BaO-2.1Na2O-10.3Ga2O3-3.1B2O-0.2Er2O3)-xYb2O3(x=0,0.9,1.9,2.8,3.6,4.5)的铝酸盐玻璃。应用差示扫描量热法、吸收光谱、荧光光谱、红外光谱以及拉曼光谱等检测手段,系统研究了不同Yb^3+离子引入量对玻璃的物性、热稳定性、Er^3+离子光谱性质和结构的影响。结果表明,Yb2O3含量越高,玻璃的密度和折射率越大,抗析晶能力有所增强。随着Yb2O3的增加,玻璃在976 nm吸收系数增大,对应于Er^3+离子的2H11/2→4I15/2、4S3/2→4I15/2以及4F9/2→4I15/2跃迁的527,549,666 nm的上转换发光、红光与绿光发光强度比以及对应于4I13/2→4I15/2的1.53μm近红外荧光强度明显增加。当Yb2O3浓度为3.6%时,铝酸盐玻璃样品在近红外1.53μm荧光最强,此时Yb^3+→Er^3+正向能量传递效率η1最大,约为82.9%。该系列铝酸盐玻璃中Er3+离子1.53μm最大发射截面为0.77×10^-20 cm^2,荧光半高宽最大值为39.4 nm,荧光寿命最大值为4.46 ms。

Effect of Yb^3+Content on Spectral Properties of E^r3+Doped Aluminate Glasses

Aluminate glass composition is(100-x)(23.6Al2O3-53CaO-7.7BaO-2.1Na2O-10.3Ga2O3-3.1B2O-0.02Er2O3)-xYb2O3(x=0,0.9,1.9,2.8,3.6,4.5),and it was prepared by conventional melting and quenching method.The effects of Yb2O3 content on the physical properties,thermal stability,spectral properties and structure of Yb3+/Er3+co-doped aluminate glasses were systematically investigated by using differential scanning calorimetry(DSC),absorption spectrum,fluorescence spectrum,infrared spectrum and Raman spectra.The results show that the density and refractive index increased with the increasing content of Yb2O3.Increasing Yb2O3 content is beneficial to increase the absorption intensity of the Yb^3+/Er^3+doped aluminate glass at 976 nm.DSC test indicates that resistance to crystallization of Yb^3+/Er^3+co-doped aluminate glasses increases with the addition of Yb3+ion content.The up-conversion emission at 527,549,666 nm corresponding to the 2H11/2→4I15/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ions,the red to green luminescence intensity ratio and near-infrared fluorescence intensity at 1.53μm corresponding to 4I13/2→4I15/2 are significantly enhanced as Yb2O3 content increasing.When Yb2O3 content reached 3.6%,the glass has the strongest near-infrared fluorescence intensity at 1.53μm.Meanwhile,the forward energy transfer efficiencyη1 of Yb3+→Er3+is the maximum,about 82.9%.In this Yb/Er co-doped aluminum glass,the maximum emission cross section,the full width at half maximum(FWHM)of the fluorescence of 1.53μm and maximum fluorescence lifetime of Er3+are 0.77×10^-20 cm^2,39.4 nm and 4.46 ms,respectively.