Distributed optical fibre sensing of temperature using time-correlated two-photon excited fluorescence

Craig J. Dalzell; Thomas P. J. Han; Ivan S. Ruddock

doi:10.1117/12.835119

5 October 2009 Distributed optical fibre sensing of temperature using time-correlated two-photon excited fluorescence

Craig J. Dalzell, Thomas P. J. Han, Ivan S. Ruddock

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75036K (2009) https://doi.org/10.1117/12.835119
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

Craig J. Dalzell, Thomas P. J. Han, and Ivan S. Ruddock "Distributed optical fibre sensing of temperature using time-correlated two-photon excited fluorescence", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036K (5 October 2009); https://doi.org/10.1117/12.835119

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