Fig. 4: Responses of the optomechanical sensor network.
From: Optomechanical sensor network with fiber Bragg gratings

a Image of the optomechanical sensor network system. b Schematic diagram of the optomechanical sensor network system. c Responses of the sensor network with nine FOMMs for the 6.4 μT AC magnetic field at the resonance frequency of the Terfenol-D rod from the coil. LS light source, DS demodulated system, SMF1 and SMF2: 1-kilometer standard SMF.