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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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Two-photon excited fluorescence in rare-earth doped optical fiber for applications in distributed sensing of temperature

Dalzell, Craig J. and Han, Thomas P. J. and Ruddock, Ivan S. and Hollis, David B. (2012) Two-photon excited fluorescence in rare-earth doped optical fiber for applications in distributed sensing of temperature. IEEE Sensors Journal, 12 (1). pp. 51-54. ISSN 1530-437X

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Abstract

Distributed temperature sensing based on time-correlated two-photon excited fluorescence (TPF) in doped optical fiber is described. Counter-propagating laser pulses generate a TPF flash at the position of their overlap which is scanned along the fiber by a variable relative time delay. The flash is transmitted to one end where it is detected and analyzed to yield the temperature from its thermal dependence. To identify suitable dopants, the two-photon excitation spectra of glass doped with various rare-earths were recorded. Preliminary results on TPF in praseodymium doped single-mode fiber are presented.