Abstract:All-optical phase-preserving amplitude regeneration is an effective method to reduce nonlinear phase noise in long-haul transmission of phase-modulated signals. Here we review the latest results on a proposed differential phase shift keying (DPSK) regeneration scheme exploiting a compact architecture based on a saturated semiconductor optical amplifier. The scheme allows for amplitude-only signal regeneration with limited excess phase-noise contribution. Both the pass-through (PT) and the four wave mixing (FWM… Show more
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