http://www.cnr.it/ontology/cnr/individuo/prodotto/ID31830
Coated long-period fiber gratings as high-sensitivity optochemical sensors. (Articolo in rivista)
- Type
- Label
- Coated long-period fiber gratings as high-sensitivity optochemical sensors. (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Alternative label
Cusano, Andrea; Iadicicco, Agostino; Pilla, Pierluigi; Contessa, Luigi; Campopiano, Stefania; Cutolo, Antonello; Giordano, Michele; Guerra, Gaetano (2006)
Coated long-period fiber gratings as high-sensitivity optochemical sensors.
in Journal of lightwave technology (Print)
(literal)
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- Cusano, Andrea; Iadicicco, Agostino; Pilla, Pierluigi; Contessa, Luigi; Campopiano, Stefania; Cutolo, Antonello; Giordano, Michele; Guerra, Gaetano (literal)
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- ISI Web of Science (WOS) (literal)
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- Institute of Composite and Biomedical Materials
Optoelectronic Division, Engineering Department, Univ. of Sannio, Benevento, Italy
University of Salerno
(literal)
- Titolo
- Coated long-period fiber gratings as high-sensitivity optochemical sensors. (literal)
- Abstract
- In this paper, the numerical and the exptl. analyses of coated long-period fiber gratings (LPFGs) as a high-sensitivity optochem. sensor are presented. The proposed structure relies on LPFGs coated with nanoscale high refractive index chem.-sensitive overlays. The deposition of overlays with refractive index higher than the cladding one leads to a modification of the cladding-mode distribution. If the overlay features are properly chosen, a strong field enhancement within the overlay occurs, leading to an excellent sensitivity of the cladding-mode distribution to the coating properties. The effects of overlay thickness and cladding-mode order on sensor performances have been numerically and exptl. investigated. In order to provide a high-sensitivity and species-specific optochem. sensor, this mechanism has been proved with nanoscale overlays of syndiotactic polystyrene (sPS) in the nanoporous cryst. Ô form. The sensitive material has been chosen in light of its selectivity and high sorption properties towards chlorinated and arom. compds. Sensor probes were prepd. by using dip-coating technique and an adequate procedure to obtain the Ô-form sPS. Exptl. demonstration of the sensor capability to perform subparts-per-million detection of chloroform in water at room temp. is also reported. (literal)
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