4.7 Article

Intense emission at 2.9 μm from Yb3+/Ho3+ co-doped TeO2-Ga2O3-ZnO tellurite glasses

期刊

JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 104, 期 7, 页码 2924-2931

出版社

WILEY
DOI: 10.1111/jace.17766

关键词

2.9 mu m; energy transfer; Tellurium glass; Yb3+/Ho3+

资金

  1. National Natural Science Foundation of China [61975156]
  2. Fundamental Research Funds for the Central Universities [203134001]
  3. Hubei Natural Science Foundation [2020CFB641]
  4. Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology)
  5. Open Fund of the Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques (South China University of Technology)

向作者/读者索取更多资源

The Yb3+/Ho3+ co-doped TGZ glass exhibits strong emission at 2.9 microns, with Ho3+ emissions increasing and Yb3+ emissions decreasing as Yb3+ concentration increases due to energy transfer. The optimized glass with 3 mol% Yb2O3 and 1 mol% Ho2O3 shows potential for mid-infrared fiber laser applications.
Mid-infrared lasers have important applications in infrared countermeasures, sensing, environmental monitoring, biomedicine, and many military and civilian fields. In this work, an intense emission at 2.9 mu m from Yb3+/Ho3+ co-doped TeO2-Ga2O3-ZnO (TGZ) glass was reported. The 2 mu m, 1.2 mu m and visible emissions were also performed to understand the competitive luminescent mechanism. With the increase in Yb3+ concentration, all the emissions of Ho3+ increased, whereas the emission of Yb3+ decreased due to the phonon-assisted energy transfer from Yb3+ to Ho3+. The lifetimes of optimized 3 mol% Yb2O3 and 1 mol% Ho2O3 co-doped TGZ glass, which has the maximum emission intensity, are 548 mu s and 1.7 ms at 2.9 and 2 mu m, respectively. The Judd-Ofelt intensity parameters, absorption, and emission cross sections were calculated to evaluate the mid-infrared fluorescence properties of this new glass matrix material. The gain coefficients show that the 2 and 2.9 mu m laser gain can be realized by small pump energy, indicating that this glass is a promising medium for the mid-infrared optical fiber laser.

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