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Upconversion channels in Er3+:ZBLALiP fluoride glass microspheres

Published online by Cambridge University Press:  31 October 2007

D. G. O'Shea
Affiliation:
Physics Department, University College Cork, Cork, Ireland Photonics Centre, Tyndall National Institute, Prospect Row, Cork, Ireland
J. M. Ward
Affiliation:
Photonics Centre, Tyndall National Institute, Prospect Row, Cork, Ireland Department of Applied Physics and Instrumentation, Cork Institute of Technology, Bishopstown, Cork, Ireland
B. J. Shortt
Affiliation:
Photonics Centre, Tyndall National Institute, Prospect Row, Cork, Ireland Department of Applied Physics and Instrumentation, Cork Institute of Technology, Bishopstown, Cork, Ireland
M. Mortier
Affiliation:
Laboratoire de Chimie de la Matière Condensée de Paris, ENSCP, 11 rue Pierre et Marie Curie, 75005 Paris, France
P. Féron
Affiliation:
ENSSAT-FOTON (CNRS-UMR 6082) Université de Rennes 1, 6 rue de Kerampont, BP 80518, 22305 Lannion Cedex, France
S. Nic Chormaic*
Affiliation:
Physics Department, University College Cork, Cork, Ireland Photonics Centre, Tyndall National Institute, Prospect Row, Cork, Ireland
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Abstract

We present results on the realization of a multicolour microspherical glass light source fabricated from the erbium doped fluoride glass ZBLALiP. Whispering gallery mode lasing and upconversion processes give rise to laser and fluorescent emissions at multiple wavelengths from the ultraviolet to the infrared. Thirteen discrete emissions ranging from 320 to 849 nm have been observed in the upconversion spectrum. A Judd-Ofelt analysis was performed to calculate the radiative properties of Er3+:ZBLALiP microspheres, including the radiative transition probabilities, the electric dipole strengths, the branching ratios and the radiative lifetimes of the transitions involved. We have also identified the primary processes responsible for the generation of the observed wavelengths and have shown that this material has an improved range of emissions over other erbium doped fluoride glasses.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2007

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