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Output spectra of the pump pulses (a) and signal pulses (b) measured at input average pump powers varying from 10 to 120 mW (the signal spectra should be divided by 20) with resolution of 0.01 nm.
Plot of the ratio between the incident and output pump powers vs the incident pump power with a linear fit.
Plot of the average power of the Raman amplified output signal with the corresponding on-off Raman gain (right axis) vs the parameter (filled circles). The values directly calculated from the measured line shape of the pump spectra are plotted with open squares. The solid line corresponds to the unbroadened pump case given by Eq. (3).
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