Multipoint measurement of strain using FSBS-induced acoustic mode resonances

Acoustic resonances induced by forward stimulated Brillouin scattering in an all-fiber setup are employed for performing a multiplexed, multipoint, strain sensor. We use an all-fiber ring resonator for the measurement of the acoustic vibrations induced in the fiber by means of electrostriction. The strain of the fiber is investigated through the analysis of the radio frequency spectrum of the acoustic mode resonances.