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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Distributed crystal fiber sensing for extreme environments

Dalzell, Craig J. and Han, Thomas P. J. and Ruddock, Ivan S. (2012) Distributed crystal fiber sensing for extreme environments. IEEE Sensors Journal, 12 (1). pp. 164-167. ISSN 1530-437X

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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 single-crystal fibers for high-temperature applications, various aspects are considered including the two-photon absorption cross-section (delta), dopant density, and the geometry of single crystal fibers. By comparing the fluorescence yield for two-photon excitation with that for single-photon excitation of the same transition, delta for ruby was measured over the 0.8-1.2 mu m range with maximum room temperature values of 5.9 x 10(-3) GM for e-polarization and 4.6 x 10(-3) GM for o-polarization at 840 nm. It is shown that values of this magnitude are adequate for a practical TPF-based crystal fiber sensor to be realized.