TY - JOUR
T1 - Upconversion Fluorescence of Tellurite Glasses Doped with Rare Earths
AU - Endo, Tadashi
AU - Tanaka, Kuniharu
AU - Takizawa, Hirotsugu
AU - Shimada, Masahiko
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - Ternary tellurite glasses were prepared by a conventional quenching method in the system TeO2-LiO0.5-YO1.5⋅IR spectra reveal that the glasses contain the following polyhedra: deformed TeO6 groups, TeO4-trigonal bipyramids, TeO3-trigonal pyramids, or combinations of these polyhedra. The highly addition of glass-network modifiers, especially Li+ion, leads to a collapse of polyhedra networks. The intense emission peak, due to the transition 4S3/2-4I15/2, was found at 546 nm in tellurite glasses doped with Er3+ under 378 nm and 973 nm excitations at the room temperature. Upon excitation at 973nm, the emission shows a typical upconversion characteristic, indicating the quadratic profiles of the emission intensities against the exciting powers. The emission intensities tend to be dependent upon 378nm excitation, but independent of Er3+ concentration upon 973 nm excitation. The excitation and emission involve two photons process through the 4I11/2 level of Er3+ion. Up conversion fluorescence is, also, enhanced at 547nm by the supplementary doping with Yb3+ion.
AB - Ternary tellurite glasses were prepared by a conventional quenching method in the system TeO2-LiO0.5-YO1.5⋅IR spectra reveal that the glasses contain the following polyhedra: deformed TeO6 groups, TeO4-trigonal bipyramids, TeO3-trigonal pyramids, or combinations of these polyhedra. The highly addition of glass-network modifiers, especially Li+ion, leads to a collapse of polyhedra networks. The intense emission peak, due to the transition 4S3/2-4I15/2, was found at 546 nm in tellurite glasses doped with Er3+ under 378 nm and 973 nm excitations at the room temperature. Upon excitation at 973nm, the emission shows a typical upconversion characteristic, indicating the quadratic profiles of the emission intensities against the exciting powers. The emission intensities tend to be dependent upon 378nm excitation, but independent of Er3+ concentration upon 973 nm excitation. The excitation and emission involve two photons process through the 4I11/2 level of Er3+ion. Up conversion fluorescence is, also, enhanced at 547nm by the supplementary doping with Yb3+ion.
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U2 - 10.2497/jjspm.42.61
DO - 10.2497/jjspm.42.61
M3 - Article
AN - SCOPUS:0029185136
VL - 42
SP - 61
EP - 66
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 1
ER -