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Proceedings Paper

New remote gas infrared optical fiber sensor
Author(s): Yasser Alayli; Sofiane Bendamardji; Serge J. Huard
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Paper Abstract

A new remote optical fiber sensor is presented for the detection of carbon dioxide by molecular absorption in the near infrared corresponding to fundamental mode v3 equals 2349 cm-1 (4.257 micrometers ). To overcome this problem of the strong attenuation signal of optical fibers in the infrared, the opto power supply, technique is used which changes the working wavelength from 4.3 micrometers to 860 nm and permits the use of standard 50/125 multimode optical fibers. The simulation of absorption has been obtained by modeling the carbon dioxide absorption spectrum. The relative absorption versus the partial pressure of carbon dioxide have been compared to different theoretical models. The establishment of the calibration curves indicate that the sensor detects partial pressures greater than 100 (mu) bar with a minimal error margin of 100 (mu) bar, which is acceptable considering the future use of the device. The sensor was designed to monitor carbon dioxide concentrations in enriched greenhouses.

Paper Details

Date Published: 23 September 1996
PDF: 8 pages
Proc. SPIE 2881, Microelectronic Structures and MEMS for Optical Processing II, (23 September 1996); doi: 10.1117/12.251242
Show Author Affiliations
Yasser Alayli, Univ. de Technologie de Compiegne (France)
Sofiane Bendamardji, Domaine Univ. St.-Jerome (France)
Serge J. Huard, Domaine Univ. St.-Jerome (France)

Published in SPIE Proceedings Vol. 2881:
Microelectronic Structures and MEMS for Optical Processing II
M. Edward Motamedi; Wayne Bailey, Editor(s)

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