Fig. 3
From: Scalable WDM phase regeneration in a single phase-sensitive amplifier through optical time lenses
All-optical phase regenerator based on a DI, XPM and PSA. a The incoherent serial DPSK signal is converted to an OOK signal using a 1-bit DI. An XPM stage is employed to transfer the data from the OOK signal to the phase of a coherent XPM probe. After combination with two phase-locked pumps, the obtained PC-DPSK signal is sent to a single PSA for phase regeneration. b Simulated constellation diagrams at the input of DI, outputs of DI, XPM and PSA. c Analytic output phase and power transfer function of the DI XPM and PSA-based optical phase regenerator with a gain of g = 2
