title: Optimal packing for cascaded regenerative transmission based on phase sensitive amplifiers.
abstract: We investigate the transmission performance of advanced modulation formats in nonlinear regenerative channels based on cascaded phase sensitive amplifiers. We identify the impact of amplitude and phase noise dynamics along the transmission line and show that after a cascade of regenerators, densely packed single ring PSK constellations outperform multi-ring constellations. The results of this study will greatly simplify the design of future nonlinear regenerative channels for ultra-high capacity transmission.
authors: Mariia
authors: M
authors: Sorokina
authors: Stylianos
authors: S
authors: Sygletos
authors: Andrew D
authors: AD
authors: Ellis
authors: Sergei
authors: S
authors: Turitsyn