Measurement of acetic acid using a fibre Bragg grating interferometer

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

Autores

Jesus, C (Autor) Outra; Susana Silva (Autor) Outra; Castanheira, M (Autor) Outra; GonzalezAguilar, G (Autor) Outra; Frazao, O (Autor) Outra; Jorge, PAS (Autor) FCUP; Baptista, JM (Autor) Outra

Revista

Título: Measurement Science and Technology

Vol. 20

Página Final: 125201

ISSN: 0957-0233

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 7 Citações

Outras Informações

ID Authenticus: P-003-E44

DOI: 10.1088/0957-0233/20/12/125201

Abstract (EN): An optical fibre sensor for determination of acetic acid is presented. The sensing probe is based on a fibre Bragg grating (FBG) Fabry-Perot cavity, coated with a thin film of sol-gel-PVP (polyvinylpyrrolidone) composite material. The polymeric thin film renders the interferometric output sensitive to the presence of carboxylic acid species. Results show that the wavelength of the interferometric peaks changes with acetic acid concentration, enabling its quantification. Coupling the fibre probe with a serrodyne modulated readout interferometer enables pseudo-heterodyne interrogation and the detection of acetic acid with a sensitivity of 92.6 deg/% L/L and a resolution of 0.2% L/L. The results demonstrate the potential of the proposed scheme to operate as a sensitive chemical sensor platform.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5