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Proceedings Paper

CO2 sensing at atmospheric pressure using fiber Fabry-Perot interferometer
Author(s): Wenwen Ma; Yelu He; Yangfan Zhao; Shilei Shen; Ruohui Wang; Xueguang Qiao
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Paper Abstract

A Fabry–Perot interferometer (FPI) for CO2 gas sensing at atmospheric pressure is proposed and experimentally demonstrated. The gas sensing material is poly(ethyleneimine) (PEI)/poly(vinylalcohol) (PVA) compound, which exhibits reversible refrative index change upon absorption and release of CO2 gas molecules. The FPI is fabricated by coating a PEI/P VA film with a thickness of 15μm film at the end face of a single-mode fiber (SMF). A well-confined interference spectrum with fringe contrast of 19.5 dB and free spectra range (FSR) of 33.15 nm is obtained. The proposed FPI sensor is sensitive to the CO2 gas concentration change, and a sensitivity of 0.2833nm/PCT is obtained. The FPI sensor provides a solution in the development of low-cost and compact gas sensors for CO2 leakage monitoring.

Paper Details

Date Published: 16 May 2017
PDF: 4 pages
Proc. SPIE 10231, Optical Sensors 2017, 102311Q (16 May 2017); doi: 10.1117/12.2265608
Show Author Affiliations
Wenwen Ma, Northwest Univ. (China)
Yelu He, Northwest Univ. (China)
Yangfan Zhao, Northwest Univ. (China)
Shilei Shen, Northwest Univ. (China)
Ruohui Wang, Northwest Univ. (China)
Xueguang Qiao, Northwest Univ. (China)

Published in SPIE Proceedings Vol. 10231:
Optical Sensors 2017
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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