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Proceedings Paper

Distributed optical fibre sensing of temperature using time-correlated two-photon excited fluorescence
Author(s): Craig J. Dalzell; Thomas P. J. Han; Ivan S. Ruddock
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Paper Abstract

Distributed temperature sensing based on time-correlated two-photon excited fluorescence (TPF) in doped optical fibre is described. Counter-propagating laser pulses generate a TPF flash at the position of their overlap which is scanned along the fibre by a variable mutual delay. The flash is transmitted to one end where it is detected and analysed to yield the temperature from its thermal dependence. As the fluorescence power is shown to be completely independent of excitation pulse duration and temporal profile, the sensor does not require an ultrashort pulse excitation source for operation. With the length of the sensed position depending only on pulse duration, there is also potential for high spatial resolution.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036K (5 October 2009); doi: 10.1117/12.835119
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. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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