A fibre optic humidity sensor based on a long-period fibre grating coated with a thin film of SiO2 nanospheres

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Viegas, D (Autor) Outra; Goicoechea, J (Autor) Outra; Corres, JM (Autor) Outra; Santos, JL (Autor) FCUP; Ferreira, LA (Autor) Outra; Araujo, FM (Autor) Outra; Matias, IR (Autor) Outra

Revista

Título: Measurement Science and Technology

Vol. 20

Página Final: 034002

ISSN: 0957-0233

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 48 Citações

Scopus - 55 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-003-MZP

DOI: 10.1088/0957-0233/20/3/034002

Abstract (EN): A novel sensing configuration for measuring humidity based on a long-period fibre grating coated with a thin film of silica nanospheres is proposed. The polymeric overlay is deposited on the grating using the electrostatic self-assembly technique. This thin film changes its optical properties when exposed to different humidity levels that translate into a shift of the resonance wavelength of the fibre grating. Wavelength shifts up to 12 nm in a relative humidity range from 20% to 80% are reported, and it is further demonstrated that such humidity sensitivity has negligible thermal dependence.

Idioma: Inglês

Tipo (Avaliação Docente): Científica