Evaluation of a 1540nm VCSEL for fibre Bragg gratings interrogation in dynamic measurement applications

García-Souto, José A.; Martín-Mateos, Pedro; Posada, Julio E.; Acedo, Pablo; Jackson, David A.

doi:10.1117/12.2059721

Cited by 2 publications

(1 citation statement)

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“…The FBG sensor was installed on a dynamic test assembly [12]. It consists of a two parallel planes structure where one is mechanically grounded (one extreme of the fibre) and the other is movable by a displacement actuator like a shaker, a loudspeaker or a PZT.…”

Section: Detection Of Dynamic Strainmentioning

confidence: 99%

Fast interrogation of fiber Bragg grating sensors using electro-optic dual optical frequency combs

et al. 2015

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In this document, a FBG interrogation system based on a multimode optical source and a direct read-out is proposed for measuring fast phenomena such as vibrations and ultrasounds. The system is based on an electro-optic dual optical frequency-comb. This architecture allows the configuration of the multimode optical source parameters such as the number of modes that are within the reflected spectrum (FWHM) of the FBG. Results are presented for the dual-comb operating under optimized control when mapping these optical modes onto detectable tones of multiples of 100 kHz around a centre radiofrequency tone (40 MHz). Dynamic strain is induced onto the fiber through an actuator, which generates changes in the reflected wavelength of the FBG and in turn the modes within the reflected spectrum. The electrical signals are analyzed using fast Fourier transform algorithms allowing identification of the vibrations.

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Section: Detection Of Dynamic Strainmentioning

confidence: 99%