Emergence of extreme events in fibre-based parametric processes driven by a partially incoherent pump wave

This paper deals about induced-modulation instability (or parametric amplification) based on a partially incoherent pump can lead to the emergence of high signal peaks deviating significantly from the average dynamics. Similarly to Raman amplification, this behavior can be explained by the instantaneous exponential transfer of the fluctuations of the pump to the signal. Additional measurements based on an initial picosecond pulse train signal confirm these trends by outlining that the resulting probability distribution deviate from Gaussian shape with a tail developing towards higher peak-powers.