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Proceedings Paper

Remote sensing network to detect and identify organic vapours
Author(s): Cesar Elosua; Rosa Ana Perez-Herrera; Manuel Lopez-Amo; Candido Bariain; Asuncion Luquin; Mariano Laguna
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Paper Abstract

In this work, a novel CWDM (Coarse Wavelength Division Multiplexing) network that multiplexes intensity modulated optical fibre sensors is presented. These transducers are based on a sensing material that suffers reversible changes in its optical properties in presence of organic vapours. This compound is fixed onto cleaved ended single mode optical fibres pigtails using Electrostatic Self-Assembly method. As their response depends on intensity changes, a referencing signal is simultaneously generated to eliminate the effect of optical source power fluctuations. Thus, a parallel array of phaseshifted fibre Bragg gratings (PS-FBGs) is included to obtain the referencing signal. Looking forward to remote sensing applications, an Erbium doped fibre amplifier (EDFA) is included in the header of the network to reach up to 4 km of distance. Four new sensors have been multiplexed and exposed to saturated atmospheres of methanol and ethanol individually, showing different response and recovery times in each case. Finally, we checked that our sensors were able to distinguish between pure and kerosene polluted water probes in terms of response and recovery times as well.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750316 (5 October 2009); doi: 10.1117/12.835219
Show Author Affiliations
Cesar Elosua, Univ. Pública de Navarra (Spain)
Rosa Ana Perez-Herrera, Univ. Pública de Navarra (Spain)
Manuel Lopez-Amo, Univ. Pública de Navarra (Spain)
Candido Bariain, Univ. Pública de Navarra (Spain)
Asuncion Luquin, Univ. de Zaragoza (Spain)
Mariano Laguna, Univ. de Zaragoza (Spain)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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