掺铒铋酸盐玻璃光谱性质的组分依赖性研究

Compositional Dependence of Spectroscopic Properties for a Erbium-Doped Bismuth-Based Glass

通过测试掺铒铋酸盐玻璃43Bi2O3-xB2O3-(57-x)SiO2(x=10,20,30,40,50 mol%)中Er3+离子的吸收光谱、荧光光谱、荧光寿命及荧光强度。结合Judd-Ofelt和McCumber理论,对玻璃中Er3+离子光谱性质随玻璃组分的依赖关系进行了系统研究.研究结果显示,掺铒铋酸盐玻璃具有较其它玻璃优异的光谱性质.随着玻璃中组分B2O3含量的增加,强度参量Ω6、荧光半高宽和能级4I15/2→4I13/2间自发辐射跃迁几率相应增加,而荧光寿命、荧光强度和受激发射峰值截面相应减小,带宽品质因子(σepeak×FWHM)在组分B2O3含量30 mol%时达到最大.

Erbium-doped bismuth-based glasses with compositions of 43Bi2 O3-xB2 O3-（57-x） SiO2 （x = 10, 20,30,40,50 mol%） were prepared, the absorption spectrum, emission spectrum, fluorescence lifetime and fluorescence intensity were measured,and the compositional dependence of spectroscopic properties of Er^3＋ ions have been investigated according to the Judd-Ofelt theory and McCumber theory. With the increasing of B2O3 content in the glass composition, the Judd-Ofelt parameter Ω6, full width at half maximum （FWHM） of fluorescence and calculated spontaneous emission probability of the ^4I15/2→^4I13/2 increase, while the fluorescence lifetime, fluorescence emission intensity and simulated emission peak cross-section decrease,and the bandwidth quality factor σe^pcak× FWHM reaches maximum at the B203 content of 30 mol%. Compared-with other oxide and fluoride glasses ever reported, the erbium-doped bismuth-based glass shows favorable optical properties and can be used as an excellent gain media for broadband amplifiers. Also,the above results will provide theoretical significance for the determining superior glass composition content of new type broadband bismuth-based erbium-doped fiber.