Fig. 1: TABS: a transient acoustic wave (TAW)-based Brillouin optical time domain analysis sensor for high-spatiotemporal-resolution distributed sensing.
From: High-spatiotemporal-resolution distributed Brillouin sensing with transient acoustic wave
a A conceptional illustration of TABS-based state imaging of large infrastructures and natural hazards. As an exemplary application, TABS is explored for state imaging of evacuated-tube transportation (ETT) maglev systems. Infor.: information stream. b1–b3, Working mechanism of TABS. b1 The SBS interaction process. ART acoustic response time (~10 ns). The TAW occurs when the pump pulse width is shorter than the ART. b2 Physical properties of TAW. n.u. normalized unit, vB Brillouin frequency shift, Freq. dim. Frequency dimension. b3 Sensor architecture of TABS. Freq. dim. prop. Frequency dimension property, Tx Transmitter, Rx Receiver, OPC optical pulse coding, Ac. GB accumulated Brillouin gain, TOF time-of-flight location method, BGR Brillouin gain ratio, SNR signal-to-noise ratio. The TABS leverages wideband and time-weighted energy transformation properties of TAW by a synergistic architecture to enhance overall sensing performance
