Remote measurement of temperature distribution using an optical fibre

Abstract

A new fibre sensor which measures temperature-distribution is proposed. The sensor uses optical-time-domain reflectometry to determine temperature-induced changes in the levels of the backscatter signal. Experiments using liquid-core fibres have demonstrated a sensitivity of 0.018 dBk⁻¹ over distances of more than 100m. The proposed sensor is able to monitor the temperature of over 100 points simultaneously. Solid core fibres have also been used; they exhibit a wide temperature range, but somewhat reduced sensitivity.

8th ECOC Cannes 21-24 Sep (1982) pp.215-218

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