Title :
Simultaneous interrogation of fiber Bragg grating sensors using an acoustooptic tunable filter
Author :
Boulet, C. ; Webb, D.J. ; Douay, M. ; Niay, P.
Author_Institution :
Sch. of Phys. Sci., Kent Univ., Canterbury, UK
Abstract :
We describe a novel technique to provide demultiplexing of fiber Bragg grating sensors, interrogated using interferometric wavelength shift detection. Amplitude modulation of multiple radio frequency driving signals allows an acoustooptic tunable filter to provide wavelength demultiplexing. We demonstrated a noise limited strain resolution of 150 nanostrain//spl radic/(Hz) and a crosstalk better than -50 dB.
Keywords :
Bragg gratings; acousto-optical filters; demultiplexing; fibre optic sensors; optical crosstalk; optical modulation; optical noise; optical tuning; acoustooptic tunable filter; amplitude modulation; crosstalk; demultiplexing; fiber Bragg grating sensors; interferometric wavelength shift detection; multiple radio frequency driving signals; noise limited strain resolution; wavelength demultiplexing; Acoustic signal detection; Amplitude modulation; Capacitive sensors; Crosstalk; Demultiplexing; Filters; RF signals; Radio frequency; Radio interferometry; Sensor phenomena and characterization;
Journal_Title :
Photonics Technology Letters, IEEE
