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.
Bibliographical note© 2013 Optical Society of America
This paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-25-31201. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Funding: EPSRC project UNLOC (Unlocking the capacity of optical communications); Marie Currie - IEF project ARTISTE (Advanced regenerator technologies for high capacity systems); Royal Society [WM120035-TEST]; EU-ICT project FOX-C (Flexible Optical Cross-connect Nodes enabling next generation flexible optical networking)