Er^(3+)单掺与Er^(3+)/Yb^(3+)双掺杂Bi_2O_3-GeO_2-B_2O_3-ZnO玻璃的光谱研究  

Optical Spectroscopy of Er^(3+),Er^(3+)/Yb^(3+) Co-doped Bi_2O_3-GeO_2-B_2O_3-ZnO Glasses

作　　者：夏海平[1] 章践立[1] 王金浩[1] 张约品[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211

出　　处：《中国稀土学报》2005年第5期524-528,共5页Journal of the Chinese Society of Rare Earths

基　　金：浙江省自然科学基金(502164);宁波市博士基金(2005A610010);宁波大学校基金(xk200418)资助项目

摘　　要：用高温融熔法制备了Er3+单掺与Er3+/Yb3+双掺杂的(60-x)Bi2O3-xGeO2-30B2O3-10ZnO(x=5,10,20,30)系统玻璃。用差热曲线(DTA)研究了该玻璃系统的热稳定性。结果表明,GeO2的掺入,使得玻璃的软化温度与结晶起始温度的差增加,玻璃的稳定性与料性增加。测定了玻璃的吸收光谱。应用McCumber理论计算了Er3+离子的受激发射截面及Er3+离子4I13/2-4I15/2发射光谱的荧光半高宽。从吸收光谱特性出发,应用J-O理论计算了玻璃中Er3+离子的强度参数(Ω2,Ω4,Ω6),Er3+离子的自发跃迁几率、荧光分支比以及辐射寿命。在970 nm波长的激发下,研究了样品在红外波段的荧光光谱。Yb2O3的掺入,大幅度地提高了970 nm波长的抽运效率以及在1.54μm波段的发光强度。The （60 - x） BiEO3-xGeOE-30BEO3-10ZnO （x = 5, 10, 20, 30 molar percent） glasses doped with Er^3 ＋ and Er^3 ＋/Yb^3＋ were fabricated by melting method. The thermal stability of the glasses was studied by their DTA curves. The results indicate that the difference between the glass transition temperature and the crystallization onset temperature increase as increase of GeO2 content, indicating that the thermal stability of the glass becomes better. The absorption spectra were recorded. The stimulated emission cross sections were calculated by McCumber theory. The Ω2, Ω4, and Ω6 parameters, transition probability, radiative lifetime, fluorescence branch ratio of Er^3＋ for optical transition were calculated from their absorption spectra in terms of reduced matrix U^（t）（λ = 2, 4, 6） character for optical transitions. The infrared emission was measured by excitation with 970 nm light and the FWHM was estimated from their emission spectra. The pumping efficiency and the intensity of emission at the band of 1.54 μm are enhanced greatly by addition of Y2O3.

关 键 词：铋基玻璃 GeO2 Er^3+单掺 Er^3+/Yb^3+双掺 热稳定性 光谱 稀土 

分 类 号：TB381[一般工业技术—材料科学与工程]