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Compositional Dependence of Infrared‐to‐Visible Upconversion in Yb 3+ ‐ and Er 3+ ‐Codoped Germanate, Gallate, and Tellurite Glasses
Author(s) -
Murata Takahiro,
Takebe Hiromichi,
Morinaga Kenji
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02326.x
Subject(s) - germanate , photon upconversion , gallate , materials science , infrared , analytical chemistry (journal) , ion , optoelectronics , chemistry , doping , optics , nuclear chemistry , physics , organic chemistry , chromatography
Upconversion fluorescences of the green 4 S 3/2 → 4 I 15/2 and red 4 F 9/2 → 4 I 15/2 transitions of the Er 3+ ion are studied for Yb 3+ ‐ and Er 3+ ‐codoped sodium germanate, potassium tantalum gallate, and barium tellurite glasses by InGaAs laser‐diode pumping. The phonon energies of the host glasses are determined by infrared‐reflection measurements. Compositional effects on the Judd—;Ofelt parameters for the Er 3+ ion, the spontaneous emission probability (SPE) of the 2 F 5/2 → 2 F 7/2 transition for the Yb 3+ ion, and the phonon energy of the glass network are discussed in terms of glass structure. The factors that affect the upconversion fluorescence intensities of the Er 3+ ion are discussed, using the phonon energy of the host glass and the SPE for the Yb 3+ ion in the germanate, gallate, and tellurite glasses.