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An X-ray absorption study of doped silicate glass, fibre optic preforms

Bowron, Daniel Timothy, Newport, Robert J., Rigden, Jane S., Tarbox, E.J., Oversluizen, M. (1996) An X-ray absorption study of doped silicate glass, fibre optic preforms. Journal of Materials Science, 31 (2). pp. 485-490. ISSN 0022-2461. (doi:10.1007/BF01139168) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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Optical fibre preforms, which have their germanosilicate core regions doped with small quantities of the rare-earth element erbium, have been studied using Extended X-ray Absorption Fine Structure Spectroscopy (EXAFS) at the germanium K absorption edge. These studies were performed using a circular X-ray beam of 100 mu m diameter, allowing information to be gathered as a radial function of position across the core region of the preform. This positioning was accomplished by means of a motorized pinhole collimator and sample stage developed for use on the focused X-ray beamline 8.1, at the SRS, Daresbury Laboratory, UK. The EXAFS results are consistent with the germanium sites coordinated to surrounding oxygen atoms at a mean distance of 0.17 nm. Absorption maps of the rare-earth and germanium distribution across the core region of the preforms have also been obtained, showing a correlation between the distributions of the two atom types.

Item Type: Article
DOI/Identification number: 10.1007/BF01139168
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 29 Apr 2009 15:17 UTC
Last Modified: 28 May 2019 13:53 UTC
Resource URI: (The current URI for this page, for reference purposes)
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