Fig. 3: Experimental results of GO-coded and single-pulse BOTDA. | Nature Communications

Fig. 3: Experimental results of GO-coded and single-pulse BOTDA.

From: Genetic-optimised aperiodic code for distributed optical fibre sensors

Fig. 3: Experimental results of GO-coded and single-pulse BOTDA.

a A 136-bit normalised coding sequence cf(n) measured at the fibre input (blue) and the retrieved df(n) (red). Inset: Zoom-in of normalised cf(n) and df(n) over a time span from 12 to 12.2 μs. b Temporal BOTDA gain traces at fibre Brillouin resonance. c SNR profiles over the entire sensing fibre. d Measured BFS profiles around a 5-m-long hotspot located near the fibre far-end. e, f BFS uncertainty profiles along with the sensing fibre for 2 and 1 m SRs, respectively.

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