MilliKelvin resolution in cryogenic temperature distributed fibre sensing based on coherent Rayleigh scattering

Xin Lu; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.2059659

2 June 2014 MilliKelvin resolution in cryogenic temperature distributed fibre sensing based on coherent Rayleigh scattering

Xin Lu, Marcelo A. Soto, Luc Thévenaz

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91573R (2014) https://doi.org/10.1117/12.2059659
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

The response of a distributed temperature sensor based on coherent Rayleigh scattering is experimentally studied in the temperature range from 77 K up to 300 K, using fibres with standard and ORMOCER coating. A precise and absolute frequency scan is performed to obtain the best temperature resolution that turns out to be in the mK range. Experimental results point out that heating and cooling processes, at cryogenic temperatures, exhibit different temperature sensitivities when standard single-mode fibres are used; however, specially coated fibres exhibit better repeatability.

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Xin Lu, Marcelo A. Soto, and Luc Thévenaz "MilliKelvin resolution in cryogenic temperature distributed fibre sensing based on coherent Rayleigh scattering", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91573R (2 June 2014); https://doi.org/10.1117/12.2059659

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