Sensitivity enhancement experimental demonstration using a low cutoff wavelength SMS modified structure coated with a pH sensitive film
Fecha
2018Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
ES/1PE/TEC2016-79367 ES/1PE/TEC2016-78047-R
Impacto
|
10.1016/j.snb.2018.02.005
Resumen
The multimode interference (MMI) effect in a single mode-multimode-single mode (SMS) can be used fordevelopment of wavelength shift detection based sensors. In this work, the focus is centered on obtainingwavelength shifts with low cutoff single mode fibers, which allows exploring the wavelength range from600 to 1000 nm, where optical sources and detectors are less expensive than at longer wavele ...
[++]
The multimode interference (MMI) effect in a single mode-multimode-single mode (SMS) can be used fordevelopment of wavelength shift detection based sensors. In this work, the focus is centered on obtainingwavelength shifts with low cutoff single mode fibers, which allows exploring the wavelength range from600 to 1000 nm, where optical sources and detectors are less expensive than at longer wavelengths. Inaddition, the application of a reduction in the fiber diameter of the SMS structure by means of HF etching,combined with the deposition of a thin-film, enables to enhance the sensitivity of the devices at thesame time the objective mentioned before is achieved. In this sense, the effect of the deposition of a pHsensitive thin-film on SMS structures with different diameters allowed attaining a maximum sensitivityof 15 nm per pH unit in the range from pH 4 to pH 6, which improves by a factor of 3 the sensitivity ofSMS sensors without etching operating at longer wavelengths. [--]
Materias
Single mode-multi mode-single mode(SMS),
Etching,
Optical fiber sensors,
pH sensor
Editor
Elsevier
Publicado en
Sensors and Actuators B, 262 (2018) 696–702
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported by the Spanish Agencia Estatal de
Investigación (AEI) and Fondo Europeo de Desarrollo Regional
(FEDER) (TEC2016-79367-C2-2-R, TEC2016-78047-R), Government
of Navarra PI044 NANOSEN, Government of Navarra
PC023-024 BIPOTSENS research grants and the Direction of Internationalization
and Academic Collaboration of the Autonomous
University of Tamaulipas.