Temperature-dependent fluorescence characteristics of an ytterbium-sensitized erbium-doped tellurite glass |
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Authors: | Xujie Li Wenjie Zhang |
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Institution: | a College of Computer Science and Engineering, Wenzhou University, Zhejiang 325035, PR China b Faculty of Information Science and Engineering, The State Key Laboratory, Base of Novel Functional Materials and Preparation Science, Ningbo University, Zhejiang 315211, PR China |
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Abstract: | In this article, the 1.5 μm emission spectra corresponding to the 4I13/2→4I15/2 transition of Er3+ in tellurite glass are studied within the temperature from 8 to 300 K. The emission spectra of Er3+: 4I13/2→4I15/2 transition are also analyzed using a peak-fit routine, and an equivalent four-level system is proposed to estimate the stark splitting for the 4I15/2 and 4I13/2 levels of Er3+ in the tellurite glass. The results indicate that the 4I13/2→4I15/2 emission of Er3+ can exhibit a considerable broadening due to a significant enhance the peak a′, and b′ change, respectively, and the peaks of which are located at about 1507 and 1556 nm. A detailed study of temperature-dependent 1.5 μm emission spectra involving the change of the corresponding sub-bands shows that as the temperature decreases from 300 to 8 K, its line-shape becomes sharper and more intense (the full-width at half-maximum decreases from 59 to 38 nm). Temperature-dependent fluorescence intensities and the experimentally determined lifetimes are investigated; the results show that a decrease behavior of fluorescence intensities and lifetimes are observed for temperature from 8 to 300 K. |
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Keywords: | 42 70 Ce 42 70 Hj 78 20 &minus e 78 55 &minus m |
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