• Chinese Journal of Lasers
  • Vol. 31, Issue 10, 1198 (2004)
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
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  • [in Chinese]
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    [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Spectra Properties and Upconversion Mechanisms of Er3+-Doped Heavy Metal Oxyfluoride Germanate Glass[J]. Chinese Journal of Lasers, 2004, 31(10): 1198 Copy Citation Text show less

    Abstract

    The absorption and upconversion spectra of Er3+-doped heavy metal oxyfluoride germanate glass were investigated, and upconversion mechanisms of Er3+ in the glass were analyzed. The Judd-Ofelt intensity parameters Ωt (t=2, 4, 6), spontaneous transition probability, fluorescence branching ratio and radiative lifetime τrad of each energy levels for Er3+ were calculated by Judd-Ofelt theory. The results showed that the intense green and weak red emissions were observed, a two-photon upconversion process was assigned to the green and red emissions, and the possible upconversion mechanisms were involved in excited state absorption and energy transfer between excited Er3+ ions. Raman spectrum indicated the fluoride ions in the glass network had important influence on upconvesion fluorescence.
    [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Spectra Properties and Upconversion Mechanisms of Er3+-Doped Heavy Metal Oxyfluoride Germanate Glass[J]. Chinese Journal of Lasers, 2004, 31(10): 1198
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