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Proceedings Paper

Distributed crystal fibre sensing for extreme environments
Author(s): Craig J. Dalzell; Thomas P. J. Han; Ivan S. Ruddock
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Paper Abstract

Distributed sensing of temperature can be achieved by using time-correlated two-photon excited fluorescence (TPF). To assess the extension of this technique to crystal fibres for high temperature applications, various aspects are considered including the two-photon absorption cross-section (δ), dopant density and the geometry of single crystal fibres. By comparing the fluorescence yield for two-photon excitation with that for single-photon excitation of the same transition, δ for ruby was measured over the 0.8-1.2 μm range with maximum room temperature values of 5.9 × 10-3 GM for epolarisation and 4.6 × 10-3 GM for o-polarisation at 840 nm. It is shown that values of this magnitude are adequate for a practical TPF based crystal fibre sensor to be realised.

Paper Details

Date Published: 8 September 2010
PDF: 4 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76533E (8 September 2010); doi: 10.1117/12.866363
Show Author Affiliations
Craig J. Dalzell, Univ. of Strathclyde (United Kingdom)
Thomas P. J. Han, Univ. of Strathclyde (United Kingdom)
Ivan S. Ruddock, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 7653:
Fourth European Workshop on Optical Fibre Sensors
José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson, Editor(s)

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