1. Sensitivity Improvement of a Humidity Sensor Based on Silica Nanospheres on a Long-Period Fiber Grating
- Author
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Francisco M. Araújo, Jose Luis Santos, Javier Goicoechea, Francisco J. Arregui, Ignacio R. Matias, Diana Viegas, Luis Alberto Ferreira, Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica, and Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila more...
- Subjects
Materials science ,Nanotechnology ,02 engineering and technology ,Long period fiber grating ,engineering.material ,lcsh:Chemical technology ,01 natural sciences ,Biochemistry ,Article ,Analytical Chemistry ,020210 optoelectronics & photonics ,Coating ,Coatings ,Humidity sensor ,long-period fiber grating ,nanospheres ,electrostatic self-assembly ,0202 electrical engineering, electronic engineering, information engineering ,lcsh:TP1-1185 ,Electrical and Electronic Engineering ,Instrumentation ,Fiber gratings ,business.industry ,010401 analytical chemistry ,Humidity ,Long-period fiber grating ,Cladding (fiber optics) ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Wavelength ,Nanofilms ,engineering ,Optoelectronics ,Electrostatic self assembly method ,Effective refractive index ,business ,Refractive index ,Nanospheres - Abstract
This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO(2)-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic Self-Assembly, is placed between the fiber cladding and the humidity sensitive film in order to increase the total effective refractive index of the coating. With this intermediate design, a three-fold improvement in the sensitivity was obtained. Wavelength shifts up to 15 nm against 5 nm were achieved in a humidity range from 20% to 80%. This work was supported in part by Fundação para a Ciência e Tecnologia (FCT) with the grant SFRH/BD/30086/2006 more...
- Published
- 2009
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