掺铒镉铝硅酸盐玻璃的Judd-Ofelt理论分析与光谱特性

发布时间：2018-06-09 02:31

本文选题：Er+离子 + 荧光光谱　；参考：《红外与激光工程》2017年02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掺铒镉铝重金属硅酸盐玻璃样品,测试了其吸收光谱、荧光光谱和荧光寿命。采用Judd-Ofelt理论,计算了样品的强度参数Ωt(t=2,4,6)以及铒离子的理论和实验振子强度、自发辐射几率、荧光分支比和荧光辐射寿命等参数,利用测得的荧光光谱计算了铒离子能级4I13/2→4I15/2的受激发射截面及荧光半高宽。结果表明:掺铒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半高宽,量子效率较高,达92.6%,与相关文献中的铒掺杂玻璃相比,具有良好的激光激发性能,有望在研制掺杂光子晶体光纤中得到应用。
[Abstract]:Fiber laser with doped photonic crystal fiber as the medium has been widely concerned by researchers. The preparation of rare earth doped glass in the core of photonic crystal fiber has become a key problem in the development of doped photonic crystal fiber. Erbium doped cadmium aluminum silicate glass samples were prepared by high temperature melting process. Their absorption spectra, fluorescence spectra and fluorescence lifetime were measured. Judd-Ofelt theory was used to calculate the intensity parameters 惟 _ t ~ (t) ~ (2 +) of the sample and the theoretical and experimental oscillator strength, spontaneous emission probability, fluorescence branching ratio and fluorescence emission lifetime of erbium ions. The excited emission cross section and the fluorescence half-width of the erbium ion energy level 4I13 / 2 and 4I15 / 2 have been calculated by using the measured fluorescence spectra. The results show that erbium doped cadmium aluminum-heavy metal silicate glasses have larger stimulated emission cross section and wider fluorescence half-width, higher quantum efficiency, reaching 92.6. Compared with the erbium-doped glasses in related literature, the glasses have good laser excitation performance. It is expected to be applied in the development of doped photonic crystal fiber.
【作者单位】：辽宁石油化工大学理学院;装甲兵工程学院;
【基金】：国家自然科学基金(61307110;21403101;11404154) 辽宁省自然科学基金(2013020151)
【分类号】：TQ171.718.2;TN248

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