Bandwidth and low-frequency effects on Brillouin precursors

It has been shown theoretically and experimentally that Brillouin precursor arises when an ultrawideband (UWB) electromagnetic wave propagates through a dispersive media under certain conditions. It is further verified experimentally that the Brillouin precursor attenuates algebraically as compared to the exponential decay experienced by the carrier. This property of the precursor field can be exploited to design remote sensing system for imaging through dispersive medium that can reach longer propagation distances due to the lower power attenuation.