Reversible NO2 Optical Fiber Chemical Sensor Based on LuPc2 Using Simultaneous Transmission of UV and Visible Light.
In this paper, an NO2 optical fiber sensor is presented for pollution monitoring in road traffic applications. This sensor exploits the simultaneous transmission of visible light, as a measurement signal, and UV light, for the recovery of the NO2 sensitive materials. The sensor is based on a multimode fiber tip coated with a thin film of lutetium bisphthalocyanine (LuPc2). The simultaneous injection of UV light through the fiber is an improvement on the previously developed NO2 sensors and allows the simplification of the sensor head, rendering the external UV illumination of the film unnecessary. Coatings of different thicknesses were deposited on the optical fiber tips and the best performance was obtained for a 15 nm deposited thickness, with a sensitivity of 5.02 mV/ppm and a resolution of 0.2 ppb in the range 0-5 ppm. The response and recovery times are not dependent on thickness, meaning that NO2 does not diffuse completely in the films.
Service d'Electromagnétisme et de Télécommunications, Université de Mons, Boulevard Dolez 31, 7000 Mons, Belgium. antonio.buenomartinez@umons.ac.be.
Antonio
A
Bueno
Materia Nova, Materials R&D Centre, Parc Initialis, Avenue Nicolas Copernic 1, 7000 Mons, Belgium. driss.lahem@materianova.be.
Driss
D
Lahem
Service d'Electromagnétisme et de Télécommunications, Université de Mons, Boulevard Dolez 31, 7000 Mons, Belgium. christophe.caucheteur@umons.ac.be.
Christophe
C
Caucheteur
Service de Science des Matériaux, Université de Mons, Rue de l'Epargne 56, 7000 Mons, Belgium. marc.debliquy@umons.ac.be.
Marc
M
Debliquy