Sensitivity optimization of a microstructured optical fiber ammonia gas sensor by means of tuning the thickness of a metal oxide nano-coating
Fecha
2019Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
ES/1PE/TEC2016-76021
Impacto
|
10.1109/JSEN.2019.2901361
Resumen
In this paper, the influence of the thickness of
metallic-oxide coatings, ITO, and SnO2 on the sensitivity of a
microstructured optical fiber Fabry–Pérot (FP) has been studied
with the aim of developing ammonia gas fiber optic sensors.
Also, the distribution of the optical power that can be coupled
to the metallic-oxide sensing films is investigated in order to
understand how the sensor’s s ...
[++]
In this paper, the influence of the thickness of
metallic-oxide coatings, ITO, and SnO2 on the sensitivity of a
microstructured optical fiber Fabry–Pérot (FP) has been studied
with the aim of developing ammonia gas fiber optic sensors.
Also, the distribution of the optical power that can be coupled
to the metallic-oxide sensing films is investigated in order to
understand how the sensor’s sensitivity can be improved; the
thickness of the coatings plays a relevant role on the sensitivity
and response time. Films with thicknesses between 200 and
850 nm were experimentally examined resulting in an optimal
thickness of 625 nm for a SnO2 film. The behavior of the sensors
toward different concentrations of ammonia gas from 10 to
130 ppm was analyzed by measuring the phase shifts of the
reflected signal using the fast Fourier transform of its optical
spectrum. The registered response/recovery times of this sensor
are below 90 s. [--]
Materias
Microstructured optical fiber,
Fabry-Pérot interferometer,
Ammonia gas,
Fast Fourier transform,
Metallic-oxides,
Thickness
Editor
IEEE
Publicado en
IEEE Sensors Journal, vol. 19, no. 13, July 1, 2019
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica, Electrónica y de Comunicación /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was supported in part by the Ministerio
de Economía y Ciencia (MINECO) of Spain within projects under Grant
TEC2016-79367-C2-2-R and Grant TEC2016-76021-C2-1-R, in part by the
FEDER funds from the European Union, and in part by the University Public
of Navarre Program Ph.D grants