FBG wide-range and high rate interrogation method

Author

Giordana, Alejandro A. ; Sicre, Enrique E. ; Duchowicz, Ricardo

Author_Institution

Centro de Investig. Opticas (CIOp), UNLP, Gonnet, Argentina

fYear

2014

fDate

11-13 June 2014

Firstpage

171

Lastpage

173

Abstract

A FBG sensor interrogation method for measuring applications requiring a wide wavelength range and a high rate interrogation is presented. An optical intensity transfer with a cosine-like shape is obtained by a fiber interferometer, which is periodically changed to a sine-like transfer by a phase modulator. The FBG sensor reflected light, after propagated through the interferometer, is detected. A tracking algorithm is used for determining the central wavelength of the FBG sensor. An analysis of the involved systematic measuring error is carried out which illustrates the method feasibility.

Keywords

Bragg gratings; fibre optic sensors; intensity measurement; light interferometers; light propagation; light reflection; measurement errors; optical modulation; optical variables measurement; phase modulation; FBG sensor interrogation method; central wavelength tracking algorithm; cosine-like shape; fiber interferometer; light propagation; light reflection; optical intensity transfer; phase modulator; sine-like transfer; systematic measurement error; Adaptive optics; Fiber gratings; Optical fiber sensors; Optical fibers; Optical interferometry;

fLanguage

English

Publisher

ieee

Conference_Titel

Biennial Congress of Argentina (ARGENCON), 2014 IEEE

Conference_Location

Bariloche

Print_ISBN

978-1-4799-4270-1

Type

conf

DOI

10.1109/ARGENCON.2014.6868491

Filename

6868491