(a) Corrected temperature trace
(b) Raman spectra signals
(c) Raman spectra running variance
Figure 4: Identifying step losses from the Raman spectra signals. (a) Corrected temperature trace along the length of the cable. (b) Raw Raman spectra Stokes and anti-Stokes data. (c) 10-point running variance of the raw Raman spectra data.