Interferometric fibre-optic sensor for acetic acid measurement

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

Jesus, C (Author) Other; Susana Silva (Author) Other; Castanheira, M (Author) Other; Gonzalez Aguilar, G (Author) Other; Frazao, O (Author) Other; Jorge, PAS (Author) FCUP; Baptista, JM (Author) Other

Conference proceedings International

Title: Proceedings of SPIE - The International Society for Optical Engineering

20th International Conference on Optical Fibre Sensors

Edinburgh, 5 October 2009 through 9 October 2009

Indexing

Scopus - 4 Citations

Other information

Authenticus ID: P-007-RFM

DOI: 10.1117/12.835145

Abstract (EN): An optical fibre sensor for determination of acetic acid is presented. The sensing probe is based on a fiber Bragg grating (FBG) Fabry-Perot cavity, coated with a thin film of sol-gel-PVP (polyVynil Pirrolidone) composite material. The polymeric thin film renders interferometric output sensitive to the presence of carboxylic acid species. Results show that the wavelength of the interferometric peaks change 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 1 deg/0.01% and a resolution of 0.2% v/v. The results demonstrate the potential of the proposed scheme to operate as a sensitive chemical sensor platform. © 2009 SPIE.

Language: English

Type (Professor's evaluation): Scientific