Simultaneous interrogation of fiber Bragg grating sensors using an acoustooptic tunable filter

Article English OPEN
Boulet, C. ; Webb, David J. ; Douay, M. ; Niay, P. (2001)
  • Subject:
    arxiv: Physics::Optics

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/v(Hz) and a crosstalk better than -50 dB.
Share - Bookmark