Spectroscopy of Yb3+ in the disordered Na2/7Gd4/7MoO4 crystal with a scheelite-type cation-deficient structure

Authors

  • Wang Zhao,

    1. Key Laboratory of Optoelectronic Materials, Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
    2. Anhui Key Laboratory of Low Temperature Co-fired Materials, Department of Physics, Huainan Normal University, Huainan, Anhui 232038, P. R. China
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  • Wei-wei Zhou,

    1. Anhui Key Laboratory of Low Temperature Co-fired Materials, Department of Physics, Huainan Normal University, Huainan, Anhui 232038, P. R. China
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  • Bo Wei,

    1. Jiangsu Key Laboratory of Advanced Functional Materials, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, P. R. China
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  • Guo-fu Wang

    Corresponding author
    1. Key Laboratory of Optoelectronic Materials, Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
    • Phone: +86 591 83714636, Fax: +86 591 83714636
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Abstract

The creation of cation vacancies in the scheelite-type framework leads to the formation of Na2/7Gd4/7MoO4 compound, where cationic sites are shared by Na+, Gd3+, and vacancies. The spectroscopic properties at ∼1 µm of this novel disordered Yb3+-doped crystal, grown by the Czochralski method, have been investigated. The absorption and fluorescence spectra at 10 and 300 K provide the important information on the absorption and emission cross-sections as well as the Stark energy-level positions of Yb3+ ions in the crystal. The wavelength dependence of the gain cross-section has been determined, which predicts a broad tuning range and potential sub-100-fs laser pulse generation. The laser parameters βmin, Isat, and Imin have been calculated, and the perspectives for applications as a laser-active material have been discussed.

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