Effect of second order signal-noise interactions in nonlinearity compensated optical transmission systems

Mohammad A.Z Al-Khateeb*, Mary McCarthy, Christian Sánchez, Andrew Ellis

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this Letter, we theoretically and numerically analyze the performance of coherent optical transmission systems that deploy inline or transceiver based nonlinearity compensation techniques. For systems where signal-signal nonlinear interactions are fully compensated, we find that beyond the performance peak the signal-to-noise ratio degradation has a slope of 3 dBSNR/dBPower suggesting a quartic rather than quadratic dependence on signal power. This is directly related to the fact that signals in a given span will interact not only with linear amplified spontaneous emission noise, but also with the nonlinear four-wave mixing products generated from signal-noise interaction in previous (hitherto) uncompensated spans. The performance of optical systems employing different nonlinearity compensation schemes were numerically simulated and compared against analytical predictions, showing a good agreement within a 0.4 dB margin of error.

Original languageEnglish
Pages (from-to)1849-1852
Number of pages4
JournalOptics Letters
Volume41
Issue number8
DOIs
Publication statusPublished - 14 Apr 2016

Bibliographical note

Funding: EPSRC (EP/J017582/1, EP/L000091/1).

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