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中文摘要：
采用高温熔融淬火法制备了Er3＋掺杂碲酸盐玻璃。测量了不同Er3＋浓度掺杂的碲酸盐玻璃的吸收光谱,应用Judd-Ofelt理论计算了J-O参数Ωλ（λ=2,4,6）,讨论了Er3＋离子浓度对碲酸盐玻璃性质的影响。在980 nm激发下,测量了样品的上转换荧光发射谱,在室温下观察到绿光（525 nm）和红光（655 nm）发射,其分别对应于Er3＋的2H11/2→4I15/2和4F9/2→4I15/2跃迁到Er3＋/Yb3＋,通过分析变激光功率激发下上转换发光光谱强度的变化,得到绿光和红光发射都是双光子过程。此外,还研究了样品的浓度猝灭机制,给出了交叉弛豫的路径。
英文摘要：
Er3 ＋ doped tellurite glasses are prepared by a facile melt-quenching technique.The absorption spectra are detected for the with various Er3 ＋ concentrations.The J-O parameters Ωλ were fitted using the Judd-Ofelt theory,and we discuss the effect of Er3 ＋ concentrations on the characteristic of tellurite glasses.The up conversion spectra are measured excited with a 980 nm laser.We observe green light （525 nm）and red light （655 nm） at room temperature,which were emitted from the Er3 ＋ transition of 2 H 1 1/2 →4 I1 5/2 and 4 F9/2 →4 I1 5/2 ,respectively.The up-conversion emission was attributed to a two-photon process by analyzing the relationship between the power of the laser and the intensity of up conversion spectra.Moreover,we also discuss the concentration quenching of the samples,and provide the existence of the cross relaxation.
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