Enhanced Strain Measurement Sensitivity with Gold Nanoparticle-Doped Distributed Optical Fibre Sensing

Figure 4

The errors of the strains. The cross-correlation results for the spectral range of (a) 10 nm, (b) 20 nm, and (c) 40 nm. The numbers (−1, −2, −3, and −4) in figures (a–c) correspond to the relative errors between the mean values and true values, the relative errors between the minimum values and the true values, the relative errors between the maximum values and the true values, and the relative errors between the mean values and true values with a threshold error of 0.5%, respectively [45].