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Proceedings Paper

Upconversion luminescence of Ho3+-and Yb3+-codoped oxyfluride glass
Author(s): Xiaobo Chen; Z. Charles Ying; N. Sawanobori
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Paper Abstract

This paper studies upconversion luminescence of oxyfluoride glass codoped with holmium and ytterbium. When the sample was excited in the infrared at a wavelength of 960 nm, several visible luminescence peaks were observed. The two strongest upconversion luminescence peaks are located at 544 and 658 nm, which are due to the 5S2 to 5I8 and 5F5 to 5I8 transitions of Ho3+, respectively. Additional upconversion luminescence peaks are present at 485, 751, and 799 nm. The upconversion luminescence process is initiated by excitation of the codoped Yb3+ ions, followed by a transfer of energy from the excited Yb3+ ions to the Ho3+ ions. The dependence of the upconversion luminescence intensity with the excitation laser power obeys a power law with fractional exponent. This unusual saturation phenomenon is likely a result of energy diffusion.

Paper Details

Date Published: 5 April 2002
PDF: 11 pages
Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); doi: 10.1117/12.461659
Show Author Affiliations
Xiaobo Chen, Beijing Normal Univ. and New Mexico State Univ. (China)
Z. Charles Ying, New Mexico State Univ. (United States)
N. Sawanobori, Sumita Optical Glass, Inc. (Japan)

Published in SPIE Proceedings Vol. 4645:
Rare-Earth-Doped Materials and Devices VI
Shibin Jiang; Robert W. Keys, Editor(s)

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