Quasi-Distributed Fabry-Perot Optical Fibre Sensor for Temperature Measurements

This paper presents a simulation and an experimental quasi-distributed Fabry&#x2013;Perot optical fibre sensor for temperature measurements implemented on a serial array using a combined frequency division multiplexing and wavelength division multiplexing arrangement. Quasi-distributed fibre sensors have been of great interest in the industry for the monitoring of power transformers, jet engines, and furnaces. This paper is aimed at providing theoretical results for a quasi-distributed sensor system made of 25 local sensors imprinted on a serial array of the single mode fibre whereby the local sensors are of weak reflectivity. In addition, a sensor system of nine quasi-distributed local sensors is experimentally tested and a sensitivity of <inline-formula> <tex-math notation="LaTeX">$10\frac { pm}{^{o}C}$ </tex-math></inline-formula> and a resolution of <inline-formula> <tex-math notation="LaTeX">$0.125^{\circ }C$ </tex-math></inline-formula> are obtained. Its higher resolution, higher spatial distribution, and ability to measure temperature at different points simultaneously make it a very attractive temperature sensor.

Abstract licence: CC BY-NC-ND

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