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Bariáin Aisa, Cándido

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https://academica-e.unavarra.es/handle/2454/48666

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Bariáin Aisa

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Cándido

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Ingeniería Eléctrica y Electrónica

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0000-0003-2865-2855

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289

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2006 - 20082
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Author: Matías Maestro, Ignacio × Subject: Fiber optic sensors ×

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Now showing 1 - 2 of 2
  • Thumbnail Image
    PublicationOpen Access
    Pyridine vapors detection by an optical fibre sensor
    (MDPI, 2008) Elosúa Aguado, César; Bariáin Aisa, Cándido; Matías Maestro, Ignacio; Rodríguez, Antonio; Colacio, Enrique; Salinas Castillo, Alfonso; Segura Carretero, Antonio; Fernández Gutiérrez, Alberto; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    An optical fibre sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in colour from blue to pink-white in presence of pyridine vapours. This complex is added to a solution of PVC (Poly Vinyl Chloride), TBP (Tributylphosphate) and tetrahydrofuran (THF), forming a plasticized matrix; by dip coating technique, the sensing material is fixed onto a cleaved ended optical fibre. The fabrication process was optimized in terms of number of dips and dipping speed, evaluating the final devices by dynamic range. Employing a reflection set up, the absorbance spectra and changes in the reflected optical power of the sensors were registered to determine their response. A linear relation between optical power versus vapor concentration was obtained, with a detection limit of 1 ppm (v/v).
  • Thumbnail Image
    PublicationOpen Access
    Development of an in-fiber nanocavity towards detection of volatile organic gases
    (MDPI, 2006) Elosúa Aguado, César; Matías Maestro, Ignacio; Bariáin Aisa, Cándido; Arregui San Martín, Francisco Javier; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    A fiber optic sensor for Volatile Organic Compounds (VOCs) detection has been developed and characterized for some organic gasses. The sensor is based on a novel vapochromic material, which is able to change its optical properties in presence of organic vapors in a reversely way. A nano Fabry Perot is constructed onto a cleaved ended optical fiber pigtail by Electrostatic Self Assembly method (ESA), doping this structure with the vapochromic material. Employing a reflection scheme, a change in the intensity modulated reflected signal at 850 nm have been registered. The response of the sensor has been evaluated for five different VOCs, and a deeper study has been made for vapors of three different alcohols.