Performance Dependence on Channel Baud-Rate of Coherent Single-carrier WDM Systems

2014 the European Conference on Optical Communication (ECOC)

Rossi

2014

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The impact of higher-order modulation-dependent nonlinear interference noise on system performance is studied in both dispersion-managed and unmanaged links, and compared to the predictions of the Gaussian Noise Model. IntroductionThe Gaussian noise (GN) model was introduced as a simple tool to predict the variance of the nonlinear interference (NLI) in dispersion unmanaged (DU) optical links 1 . Despite its reasonable predictions of system reach, its accuracy is limited in short links because of the key assumption of a modulation-independent stationary Gaussian input field 2 . Such a problem in crosschannel interference (XCI) dominated links has been explained by some extra modulation dependent (MD) higher-order NLI terms neglected by the GN model 3,4 .Such a model was recently extended to include self channel interference (SCI) in 5 .In this paper, by extending the time-domain based approach of 6 to include MD higher-order XCI and SCI, we show that it is possible to i) quickly estimate the maximum reach with good accuracy even for dispersion managed (DM) links where the GN model fails, and ii) investigate performance of a wavelength division multiplexing (WDM) comb filling the whole 5 THz bandwidth of erbium doped fiber amplifiers where standard split-step Fourier (SSF) simulations are prohibitively long.

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Section: Resultsmentioning

confidence: 99%

The impact of the modulation dependent nonlinear interference missed by the Gaussian noise model

2014 the European Conference on Optical Communication (ECOC)

Rossi

2014

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“…Note that with ideal DBP only cross-nonlinear effects remain, and the reach N 0 is essentially independent of the channel symbol rate and just depends on bandwidth efficiency η [18]. Hence the dashed DBP curve in Fig.…”

Section: Reach Under-estimationmentioning

confidence: 97%

Regeneration savings in flexible optical networks with a new load-aware reach maximization

Optical Switching and Networking

Morea³

et al. 2016

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“…3, obtained at both R = 10Gbaud and R = 28Gbaud on SMF fiber, both without nonlinearity compensation and with ideal DBP. Note that with ideal DBP only cross-nonlinear effects remain, and the reach N 0 is essentially independent of the channel symbol rate and just depends on bandwidth efficiency η [12].…”

Section: Th European Conference On Network and Optical Communicatimentioning

confidence: 99%

Load-aware transparent reach maximization in flexible optical networks

2014 19th European Conference on Networks and Optical Communications - (NOC)

Picchi

et al. 2014