用熔融淬冷法制备了系列掺杂浓度的Dy3+∶Ge-Ga-Se-KBr硫卤玻璃样品,测试了样品的折射率、吸收光谱、近红外及中红外荧光谱。应用Judd-Ofelt理论计算了Dy3+离子的强度参数(Ωi,i=2,4,6)、自发辐射跃迁几率(A)、荧光分支比(β)和辐射寿命(τrad)等光谱参数。研究了810 nm激光泵浦下样品中红外荧光特性与掺杂浓度之间的关系,利用McCumber(MC)和Futchbauer-Ladenburg(FL)理论分别计算了常温Dy3+:6F5/2→6H9/2(2.17μm),6F11/2(6H9/2)→6H13/2(2.47)和6H13/2→6H15/2(2.86μm)中红外荧光的受激发射截面。
A serial of chalcohalide glasses based on Ge-Ga-Se-KBr system doped with different Dy3+ ions were synthesized by melt-quenching technique.The refractive indexes,Raman spectra,absorption spectra,near-and mid-infrared fluorescence of glass samples were measured.The intensity parameters(Ωi,i=2,4,6),transition probabilities(A),branching ratios(β) and radiative lifetimes(τrad) were predicted for Dy3+ ions in samples by using the Judd-Ofelt theory.The mid-infrared fluorescence properties were investigated with different Dy3+ ion concentrations at 810 nm laser excitation.The stimulated emission cross-section of mid-infrared fluorescence Dy3+:6F5/2,→6H9/2(2.17 μm),6F11/2(6H9/2)→6H13/2(2.47 μm) and 6H13/2→6H15/2(2.86 μm) were calculated by McCumber(MC) and Futchbauer-Ladenburg(FL) theory.