Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5026357 | Optik - International Journal for Light and Electron Optics | 2016 | 33 Pages |
Abstract
Upconversion (UC) fluorescence photons have been quantified precisely in Tm3+/Yb3+ doped waveguide-adaptive aluminum germanate glasses under the excitation of 975Â nm laser with different power density. The quantum yield (QY) for intense near-infrared (NIR), weak red and efficient blue multi-photon UC emissions of Tm3+ is identified as a positive correlation with laser power density, and the increasing tendency of the QY for three-photon fluorescence is extremely severe. The absolute QY values for 477Â nm blue and 806Â nm NIR UC emissions are derived to be 1.43Â ÃÂ 10â4 and 36.11Â ÃÂ 10â4, respectively, when the excitation power density is set to 1482Â W/cm2. The macroscopic quantization of UC photons in Tm3+/Yb3+ doped aluminum germanate glasses provides a valuable reference in developing integrated waveguide-typed irradiation light sources.
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Authors
Cailing Zhu, Xin Zhao, Zhiqiang Wang, H. Lin,