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Sensitizing effect of Yb3+ on near-infrared fluorescence emission of Cr4+-doped calcium aluminate glasses

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Abstract

We have demonstrated that an efficient energy transfer takes place from Yb3+ to Cr4+ in calcium aluminate glasses. Yb3+ improves excitation efficiency at around 980 nm, enhancing emission intensity of Cr4+ fluorescence at 1.2–1.6 μm. Nonradiative energy transfer via electric dipole–dipole interaction between ytterbium and chromium ions was found to be dominant over radiative Yb3+ → Cr4+ energy transfer. A diffusionlimited energy transfer mechanism well explains the decay behavior of Yb3+/Cr4+- codoped glasses. This codoping scheme may be applicable to other Cr4+-containing crystals and glasses.

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Authors and Affiliations

  1. Telecommunication Basic Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Yusong, P.O. Box 106, Taejon, 305-600, Korea

    Yong Gyu Choi & Kyong Hon Kim

  2. Photonic Glasses Laboratory, Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk, 790-784, Korea

    Yong Seop Han & Jong Heo

Authors
  1. Yong Gyu Choi
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  2. Kyong Hon Kim
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  3. Yong Seop Han
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  4. Jong Heo
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Choi, Y.G., Kim, K.H., Han, Y.S. et al. Sensitizing effect of Yb3+ on near-infrared fluorescence emission of Cr4+-doped calcium aluminate glasses. Journal of Materials Research 15, 278–281 (2000). https://doi.org/10.1557/JMR.2000.0045

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