Figure 2Maximum allowed sampling interval required to obtain a given spatial resolution when using a bit duration of 140 ps for a noninstantaneous phase modulation (solid blue line) and a perfect square modulation (dashed red line). The dash-dotted black line represents the asymptotic case commonly used in the state-of-the-art, considering a sampling interval equal to the spatial resolution. Andrey Denisov, Marcelo A Soto and Luc Thévenaz, Marcelo A Soto,Luc Thévenaz Going beyond 1000000 resolved points in a Brillouin distributed fiber sensor: theoretical analysis and experimental demonstration null,2016,5(5) http://dx.doi.org/10.1038/lsa.2016.74