Journal
OPTICAL MATERIALS
Volume 33, Issue 6, Pages 835-838Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2011.01.005
Keywords
Erbium; Luminescence; Silica; Preform of optical fibre; Crystallization; Phosphorus
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In rare-earth-doped silica optical fibres, the homogeneous distribution of amplifying ions and part of their spectroscopic properties are usually improved by adding selected elements, such as phosphorus or aluminum, as structural modifier. In erbium ion (Er3+) doped fibres, phosphorus preferentially coordinates to Er3+ ions to form regular solvation shells around it. However, the crystalline structures described in literature never gave particular spectroscopic signature. In this article, we report emission and excitation spectra of Er3+ in a transparent phosphorus-doped silica fibre preform. The observed line features observed at room and low temperature are attributed to ErPO4 crystallites. (C) 2011 Elsevier B.V. All rights reserved.
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