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 journalArticlepeer-review

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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