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Proceedings Paper

NIR to visible upconversion in rare-earth Ion-doped NaYF4 crystals
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Paper Abstract

In this paper we investigate the infrared-to-visible upconversion luminescence in bulk crystals and nanocolloid filled photonic crystal fiber with ytterbium and erbium co-doped NaYF4 upconversion phosphor. The phosphor was prepared by using simple co-precipitation synthetic method. The initially prepared phosphor has very weak upconversion fluorescence. The fluorescence significantly increased after the phosphor was annealed at a temperature of 400°C. Nanocolloids of this phosphor were obtained using water and methanol as solvents and they were utilized as laser filling medium in photonic crystal fibers. Under 980nm laser excitation very strong upconversion signals were obtained at 408 nm, 539 nm and 655 nm. Efficiency and decay life time study of the upconverted emissions was conducted to understand the upconversion mechanisms. The reported nanocolloids are good candidates for fluorescent biosensing applications and also as a new laser filling medium in fiber lasers.

Paper Details

Date Published: 25 February 2010
PDF: 9 pages
Proc. SPIE 7598, Optical Components and Materials VII, 759821 (25 February 2010); doi: 10.1117/12.843366
Show Author Affiliations
Darayas Patel, Oakwood Univ. (United States)
Calvin Vance, Oakwood Univ. (United States)
Newton King, Oakwood Univ. (United States)
Malcolm Jessup, Oakwood Univ. (United States)
Lekara Green, Oakwood Univ. (United States)
Sergey Sarkisov, SSS Optical Technologies (United States)

Published in SPIE Proceedings Vol. 7598:
Optical Components and Materials VII
Shibin Jiang; Michel J. F. Digonnet; John W. Glesener; J. Christopher Dries, Editor(s)

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