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Optical Engineering

High-temperature sensor based on resonant reflection in hollow core fiber
Author(s): Biao Feng; Yi Liu; Shiliang Qu
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Paper Abstract

This paper proposes a simple high-temperature sensor, which is fabricated by splicing a section of silica capillary tube (SCT) between two conventional single mode fibers (SMF). The resonance dips in the transmission spectrum resulting from the resonant reflection in SCT shift to red when temperature rises because of the positive thermo-optical coefficient of fused silica. In the temperature range from 200°C to at least 850°C, the sensor with an SCT length of about 25,012.8  μm obtained a temperature sensitivity of 28.97  pm/°C, which is close to theory analysis, 31.49  pm/°C. It can have actual application in high-temperature sensing due to its characteristics of good repeatability, great linearity, simple structure, and low cost.

Paper Details

Date Published: 28 October 2016
PDF: 5 pages
Opt. Eng. 55(10) 106127 doi: 10.1117/1.OE.55.10.106127
Published in: Optical Engineering Volume 55, Issue 10
Show Author Affiliations
Biao Feng, Harbin Institute of Technology in Weihai (China)
Yi Liu, Harbin Institute of Technology in Weihai (China)
Shiliang Qu, Harbin Institute of Technology in Weihai (China)

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