Title :
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
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;
Conference_Titel :
Biennial Congress of Argentina (ARGENCON), 2014 IEEE
Conference_Location :
Bariloche
Print_ISBN :
978-1-4799-4270-1
DOI :
10.1109/ARGENCON.2014.6868491
