Dynamics of energy transfer and frequency upconversion in Tm3+ doped fluoroindate glass
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Resumo
The spectroscopic properties of Tm3+-doped fluoroindate glasses (FIG) were described by single wavelength pumping in the red region. The Judd-Ofelt (J-O) theory was used to obtain the quantum efficiency of the 4f-4f transitions and other spectroscopic parameters. The dynamics of the fluorescence was investigated and energy transfer (ET) processes among Tm3+ ions were studied. The results indicate that a two-step one-photon absorption process is responsible for the ultraviolet upconversion (UC) emissions, and dipole-dipole interaction provides the main contribution for ET rate is equal to the decay rate of noninteracting among active ions.
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Absorption spectroscopy, Concentration (process), Doping (additives), Energy transfer, Fluorescence, Optical frequency conversion, Optical pumping, Positive ions, Quantum efficiency, Thulium, Dipole-dipole interactions, Excitation sources, Fluoroindate glasses (FIG), Wavelength pumping, Optical glass
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Inglês
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Journal of Applied Physics, v. 96, n. 5, p. 2530-2534, 2004.
