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2013 | 124 | 3 | 471-473
Article title

Effect of Temperature on Upconversion Luminescence in Yb^{3+}/Tb^{3+} Co-Doped Germanate Glass

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EN
Abstracts
EN
In the article effect of temperature on the cooperative energy transfer in germanate glass co-doped with $Yb^{3+}/Tb^{3+}$ under 976 nm laser diode pumping was investigated. The optimization of $Tb^{3+}$ concentration on the upconversion luminescence was determined. Strong luminescence at 489, 543, 586, 621 nm corresponding to $^{5}D_{4} → ^{7}F_{J}$ (J = 6,4,3) transitions and luminescence at 381, 415, 435 nm resulting from $^{5}D_{3}, ^{5}G_6 → ^{7}F_{J}$ (J=6,5,4) transitions were presented. The highest upconversion emission intensity was obtained in glass co-doped with $0.7Yb_{2}O_{3}/0.7Tb_{2}O_{3}$ (mol%). The effect of temperature on the luminescent properties of germanate glass in the range of 5-250°C indicates the presence of competing phenomena: an increase in the effective absorption cross-section of $Yb^{3+}$ ions donor as a function of temperature and migration of energy between pairs of ions $Yb^{3+}-Yb^{3+}$ and of multiphonon excitation levels $^{7}F_{J}$.
Keywords
EN
Contributors
  • Department of Optoelectronics and Lighting Technology, Faculty of Electrical Engineering, Białystok University of Technology, Wiejska 45D, 15-351 Białystok, Poland
author
  • Department of Optoelectronics and Lighting Technology, Faculty of Electrical Engineering, Białystok University of Technology, Wiejska 45D, 15-351 Białystok, Poland
author
  • Department of Optoelectronics and Lighting Technology, Faculty of Electrical Engineering, Białystok University of Technology, Wiejska 45D, 15-351 Białystok, Poland
author
  • Department of Optoelectronics and Lighting Technology, Faculty of Electrical Engineering, Białystok University of Technology, Wiejska 45D, 15-351 Białystok, Poland
author
  • Department of Optoelectronics and Lighting Technology, Faculty of Electrical Engineering, Białystok University of Technology, Wiejska 45D, 15-351 Białystok, Poland
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv124n324kz
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