Impact of signal-ASE four-wave mixing on the effectiveness of digital back-propagation in 112 Gb/s PM-QPSK systems
Open Access
- 8 February 2011
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 19 (4), 3449-3454
- https://doi.org/10.1364/oe.19.003449
Abstract
Limitations in the performance of coherent transmission systems employing digital back-propagation due to four-wave mixing impairments are reported for the first time. A significant performance constraint is identified, originating from four-wave mixing between signals and amplified spontaneous emission noise which induces a linear increase in the standard deviation of the received field with signal power, and linear dependence on transmission distance.Keywords
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