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Proceedings Paper

LPG based fiber optic sensor for carbon dioxide
Author(s): C. Gouveia; K. Balogh; J. M. Baptista; B. Kovacs; P. A. S. Jorge
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Paper Abstract

In this work a novel optical-fiber sensor for carbon dioxide measurement is presented. A polymeric sensitive layer based on the acid-base equilibrium of phenol and of its derivative 4-nitro-phenol is used for carbon dioxide determination. The sensitive material presents changes in color and in its refractive index. Colorimetric and refractometric measurements were performed. The results show the sensor is more sensitive for lower concentrations and a saturation effect occurs for higher levels. For the colorimetric response, a resolution of ±0.15% was estimated and a response time of 30s was measured. For the refractometric measurements, a resolution of ±0.50% could be estimated and a response time of 12s was measured. Reversibility and reproducibility were also demonstrated.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216L (7 November 2012); doi: 10.1117/12.975279
Show Author Affiliations
C. Gouveia, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
K. Balogh, INESC Porto (Portugal)
Univ. of Pécs (Hungary)
J. M. Baptista, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
B. Kovacs, Univ. of Pécs (Hungary)
P. A. S. Jorge, INESC Porto (Portugal)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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