four-wave mixing-based phase sensitive amplification with pulsed signal input
The four-wave mixing (FWM)-based phase sensitive amplification (PSA) with pulsed signal input is investigated. A set of exact analytical solutions for the output amplitude and phase of PSA is derived, taking into account the pump depletion and the self- and cross-phase modulation (SPM and XPM) from pumps, signal and idler. Simplified analytical expression of output idler power is obtained, which shows that, the amplified signal/idler pulse will be compressed firstly due to the phase distortion of input signal, then will be broadened due to pump-depletion.
four-wave mixing phase sensitive amplification pulse pump depletion signal processing phase regeneration