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Proceedings Article

Distributed crystal fibre sensing for extreme environments

[+] Author Affiliations
Craig J. Dalzell, Thomas P. J. Han, Ivan S. Ruddock

Univ. of Strathclyde (United Kingdom)

Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76533E (September 08, 2010); doi:10.1117/12.866363
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From Conference Volume 7653

  • Fourth European Workshop on Optical Fibre Sensors
  • José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson
  • Porto, Portugal | September 08, 2010

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.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Craig J. Dalzell ; Thomas P. J. Han and Ivan S. Ruddock
"Distributed crystal fibre sensing for extreme environments", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76533E (September 08, 2010); doi:10.1117/12.866363; http://dx.doi.org/10.1117/12.866363


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