Numerical modelling of the pump-to-signal relative intensity noise transfer in two-pump fibre optical parametric amplifiers

摘要: An accurate numerical model to investigate the pump-to-signal relative intensity noise (RIN) transfer in two-pump fibre optical parametric amplifiers (2-P FOPAs) for low modulation frequencies is presented. Compared other models field, this takes into account loss, pump depletion as well gain saturation. As a result, allows include wide range of practical circumstances, both and beyond undepleted regime, related different applications FOPAs. In small-signal or predicts ripples RIN spectrum very yields better results than those models. It shown that power variations do not remain unchanged over length amplifier high signal powers, when FOPA saturates, minimum occurs. The are also compared with available experimental data field good agreement can be seen.