Thinned fiber Bragg gratings as refractive index sensors (Articolo in rivista)

Type
Label
  • Thinned fiber Bragg gratings as refractive index sensors (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • Iadicicco, A., Cusano, A., Campopiano, S., Cutolo, A., Giordano, M. (2005)
    Thinned fiber Bragg gratings as refractive index sensors
    in IEEE sensors journal
    (literal)
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  • Iadicicco, A., Cusano, A., Campopiano, S., Cutolo, A., Giordano, M. (literal)
Pagina inizio
  • 1288 (literal)
Pagina fine
  • 1294 (literal)
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  • 5 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • cit. 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Optoelectronic Division, Engineering Department, University of Sannio, 82100 Benevento, Italy; Institute of Composite and Biomedical Materials National Research Council (IMCB-CNR), 80125 Napoli, Italy; University of Sannio, Benevento, Italy; Department of Engineering, University of Sannio, Benevento, Italy; (literal)
Titolo
  • Thinned fiber Bragg gratings as refractive index sensors (literal)
Abstract
  • In this work, highly sensitive refractive index measurements have been experimentally demonstrated by using thinned fiber Bragg grating (FBG) sensors. When the cladding diameter is reduced, significant changes in the effective refractive index occur due to surrounding medium refractive index modifications, leading to Bragg wavelength shifts. Uniformly thinned FBGs have been obtained by using wet chemical etching in hydrofluoric acid solutions. In order to prove sensor sensitivity, experimental tests have been carried out by using glycerine solutions with well-known refractive indices. Obtained results agree well with the numerical analysis carried out by using the three-layer fiber model. If the cladding layer is completely removed, resolutions of ¡Ö 10-5 and ¡Ö 10-4 for the outer refractive index around 1.450 and 1.333, respectively, are possible. Finally, a novel approach based on the selective etching along the grating region has been analyzed, leading to high-sensitivity refractive index sensors based on intensity measurements. (literal)
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