Identifying and Correcting Step Losses in Single-Ended Fiber-Optic Distributed Temperature Sensing Data

Figure 1

Sample Raman spectra data for a 1000 m fiber at uniform temperature. (a) An undamaged fiber with no step loss. (b) A fiber with a step loss at 500 m.

(a) Undamaged fiber at uniform temperature

(b) Damaged fiber at uniform temperature