Preprint Article Version 1 This version is not peer-reviewed

Enhancement of Distributed Temperature Sensitivity Using Al-Coated Fiber in OFDR

Version 1 : Received: 31 May 2018 / Approved: 31 May 2018 / Online: 31 May 2018 (11:41:37 CEST)

How to cite: Kwon, Y.; Naeem, K.; Jeon, M.Y.; Kwon, I. Enhancement of Distributed Temperature Sensitivity Using Al-Coated Fiber in OFDR. Preprints 2018, 2018050477 (doi: 10.20944/preprints201805.0477.v1). Kwon, Y.; Naeem, K.; Jeon, M.Y.; Kwon, I. Enhancement of Distributed Temperature Sensitivity Using Al-Coated Fiber in OFDR. Preprints 2018, 2018050477 (doi: 10.20944/preprints201805.0477.v1).

Abstract

We present a distributed optical-fiber temperature sensor with enhanced sensitivity based on an Al-coated fiber using the Rayleigh backscattering spectra (RBS) shift in optical frequency-domain reflectometry (OFDR). The Al-coated sensing fiber with a higher thermal expansion coefficient compared to silica produces a strain-coupled shift in the RBS under an increase in temperature. This effect leads to an enhanced temperature sensitivity of the distributed measurement scheme. Our results revealed that the temperature sensitivity obtained using the Al-coated fiber in OFDR was ~56% higher relative to that of a single-mode fiber. Moreover, the minimum measurable temperature recorded was 1 °C with a spatial resolution of 5 cm.

Subject Areas

optical frequency domain reflectometry; distributed sensor; temperature sensor; tunable laser; coated fiber

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