掺钕镉铝硅酸盐玻璃的Judd-Ofelt理论分析与光谱特性

发布时间：2018-03-24 21:42

  本文选题：Nd+掺杂　切入点：荧光光谱　出处：《光谱学与光谱分析》2017年05期

【摘要】：以掺杂光子晶体光纤为介质的光纤激光器一直受到科研工作者的广泛关注,应用于光子晶体光纤纤芯的掺稀土元素玻璃的制备成为研制掺杂光子晶体光纤的关键问题。利用高温熔融工艺制备钕离子掺杂的40SiO_2-14Al_2O_3-(40-x)CdO-2Li2O-2K2O-2Na_2O-xNd_2O_3(x=0.07,0.14,0.21,0.35,0.42,0.56mol)重金属硅酸盐玻璃系统,测试了其吸收光谱和荧光光谱。采用Judd-Ofelt理论,计算了玻璃样品的强度参数Ωt(t=2,4,6)以及钕离子的自发辐射概率、荧光分支比、荧光辐射寿命等参数。利用测得的荧光光谱计算了钕离子能级跃迁4 F3/2→4 I11/2的受激发射截面及荧光有效线宽。结果表明:当掺Nd_2O_3的摩尔分数为0.42时,制备的镉铝重金属硅酸盐玻璃具有较大的受激发射截面和比较宽的荧光有效线宽,且与相关文献中的钕离子掺杂玻璃相比,具有良好的激光性能和增益性能,有望在研制掺杂光子晶体光纤中得到应用。
[Abstract]:Fiber lasers doped with photonic crystal fibers have been widely concerned by researchers. The preparation of rare earth doped glass used in the core of photonic crystal fiber has become the key problem in the development of doped photonic crystal fiber. Neodymium doped 40SiO2-14Al2O3-Al2O3-Nd2O-40-xCdO-2Li2O-2K2O-2Na2O-xNd2O-structure structure has become the key problem in the preparation of doped photonic crystal fiber (PCF). The Nd-doped 40SiO2-14Al2O3-Ni2O2K2O-2Na2O-xNd2Ostructure system is a heavy metal silicate glass system. The absorption spectra and fluorescence spectra of the glass samples were measured. The intensity parameter 惟 tttttttn2c4c6), the spontaneous emission probability and the fluorescence branching ratio of neodymium ions were calculated by using Judd-Ofelt theory. Fluorescence lifetime and other parameters. The ND ~ (3 +) energy level transition 4 F _ 3 / 2 was calculated by using the measured fluorescence spectra. 鈫，

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