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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 relative time delay. The flash is transmitted to one end where it is detected and analysed to yield the temperature from its thermal dependence. With the fluorescence power being completely independent of excitation pulse duration and temporal profile, the sensor does not require ultrashort excitation pulses for operation. There is potential for high spatial resolution as the length of the sensed region depends only on pulse duration. Preliminary results are presented for praseodymium doped single-mode fibre.

Paper Details

Date Published: 8 September 2010
PDF: 4 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76532Y (8 September 2010); doi: 10.1117/12.866366
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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