975 nm脉冲激励下铋酸盐玻璃中铒离子荧光的动态响应

用高温熔融退火法制备了组分为Bi_2O_3-B_2O_3-SiO_2掺铒铋酸盐玻璃,测试分析了铋酸盐玻璃中铒离子的光谱特性,着重研究了975nm脉冲泵浦光激励下1.5 μm波段荧光的动态响应.研究表明,对应脉冲泵浦光上下边沿,铒离子荧光存在着一个上升和下降响应过程,响应速率取决于4I13/2能级Er~(3+)离子荧光寿命.随着B_2O_3组分含量的提高,玻璃中OH基引起的能量传递导致Er~(3+)离子荧光寿命相应减小,荧光响应随之相应加快.

Transient Response of Er~(3+) Fluorescence in Bismuth-based Glass under 975 nm-pulsed Excitation

Er~(3+)-doped bismuth-based glasses with the composition of Bi_2O_3-B_2O_3-Si_2O were prepared by conventional high-temperature melting and annealing method.The 1.5 μm band spectroscopic properties of Er~(3+) were measured and analyzed,and the research focused on the transient response of 1.5 μm band fluorescence under the pulse excitation at 975 nrn.The results show that there was a rise-and fall-response process of Er~(3+) fluorescence corresponding to the up and down-edge of 975 nm pulse,respectively,and the response rate is dependent on the lifetime of Er~(3+) at 4I13/2 level.With the increase of Bi_2O_3 component content,the lifetime of Er~(3+) decreases resulting from the energy transfer aroused by OH groups in the glass,and the response becomes faster accordingly.