Nonlinear cumulated phase as a criterion to assess performance of terrestrial WDM systems

Antona, Jean‐Christophe; Bigo, S.; Faure, Jean-Paul

doi:10.1109/ofc.2002.1036419

Cited by 40 publications

(33 citation statements)

References 2 publications

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“…All results will be expressed in terms of the average nonlinear phase, which is used in the optimization of single-channel dispersion-mapped transmission systems impaired by SPM [18] since performance scales as the product of transmitted power and number of spans. The PG nonlinear phase threshold Φ th = γN P th /α ∝ Λ(N ) −1/4 obtained by using (11) converges to a fixed value with an increasing number of spans, as shown for instance in Fig.…”

Section: System Implications Of Pgmentioning

confidence: 99%

Parametric gain in the strongly nonlinear regime and its impact on 10-Gb/s NRZ systems with forward-error correction

Serena

Bononi

Antona³

et al. 2005

J. Lightwave Technol.

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Abstract-In this paper, we show that the nonlinear parametric gain (PG) interaction between signal and noise is a nonnegligible factor in the design and analysis of long-haul dispersion-managed optical 10-Gb/s ON-OFF keying nonreturn to zero transmission systems operated at small signal-to-noise ratios (OSNRs) such as those employing forward-error correction (FEC) coding. In such a regime, we show that the in-phase noise spectrum exhibits a large gain close to the carrier frequency, which is due to the higher order noise terms accounting for the noise-noise beating during propagation that is usually neglected in the nonlinear Schrödinger equation. With a novel stochastic analysis that keeps such higher order terms, we are able to analytically quantify the maximum tolerable signal power after which PG unacceptably degrades system performance. We verify such an analytical power threshold by both simulation and experiment. We finally quantify the needed extra OSNR, or equivalently FEC coding gain, required when taking PG into account.

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Section: System Implications Of Pgmentioning

confidence: 99%

Parametric gain in the strongly nonlinear regime and its impact on 10-Gb/s NRZ systems with forward-error correction

Serena

Bononi

Antona³

et al. 2005

J. Lightwave Technol.

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“…i) The nonlinear cumulated phase plays a key role in setting performance of DM terrestrial systems [7]. ii) For a given nonlinear cumulated phase, the single parameter is sufficient to determine system performance of optimized DM links, where is the group-velocity dispersion (GVD) parameter of the transmission fiber, its effective length, and the bit-rate [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

A Unified Design Framework for Single-Channel Dispersion-Managed Terrestrial Systems

Bononi

Serena

Orlandini

2008

J. Lightwave Technol.

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Abstract-This paper provides a unified framework to the design, performance optimization, and accurate numerical simulation of periodic, dispersion-managed (DM) single-channel long-haul optical transmission systems for nonsoliton on-off keying (OOK) modulation. The focus is on DM terrestrial systems, with identical spans composed of a long transmission fiber compensated at the span end by a linear dispersion compensating module, with pre-and postcompensation fibers at the beginning and end of the link. The framework is based on the dispersion-managed nonlinear Schrödinger equation (DM-NLSE). First, expressions of the DM-NLSE kernel are provided both in the frequency and the time domain, and a novel map strength parameter, appropriate for terrestrial systems, is introduced. It is then shown that the DM-NLSE contains all the basic information needed for system design, as summarized by three parameters: i) nonlinear phase, ii) in-line dispersion, and iii) map strength. Through a large-signal perturbative analysis of the DM-NLSE, the well-known linear relationship between the in-line dispersion and the optimal precompensation is derived, along with the large-signal step response of the DM link, from which the ghost pulses energy growth and a first estimation of the link memory are derived. The DM-NLSE is then linearized around the average signal field to get the amplitude/phase small-signal system matrix of the overall DM link, including pre-and postcompensation. By a singular-value decomposition of the small-signal DM link matrix, a novel expression of the memory of the optimized DM link is finally provided. Knowledge of such a memory is mandatory to run accurate numerical simulations and laboratory measurements with a sufficiently long pseudorandom bit sequence to avoid patterning effects.Index Terms-Dispersion-managed nonlinear Schrödinger equation, optical fiber memory, perturbation methods, pseudorandom binary sequence (PRBS) length, small-signal analysis.

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“…For the purpose of speed, not only should QoT be simple to calculate, but the physical parameters of each section of the lightpath under test should be quick to evaluate and easy to combine. This is the reason we concentrate on the power of the detected signal, P s , and other parameters that are cumulative along the lightpath, namely, the power of amplified spontaneous emission (P ASE ), PMD, CD, non-linear phase (NLP) [1], and the power of the in-band optical crosstalk signal (P Xtalk ) generated in the OXC [13]. To begin, the accuracy of the estimator depends on its domain of validity: the more focused the engineering rules of the network (for instance, in terms of type of fiber or of chromatic dispersion map), the more accurate the QoT estimator will be.…”

Section: Qot Estimator Accuracy and Efficiencymentioning

confidence: 99%

A new method to plan more realistic optical transparent networks

Zami¹,

Morea²,

Leplingard³

2010

Bell Labs Tech. J.

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Optically transparent routing of wavelength division multiplexed (WDM) channels, which is a major trend in optical networksachieving that goal, as it incorporates routing which is agnostic to the modulation format and/or the modulation rate of the routed signal. It can also contribute to decreasing global network power consumption by avoiding the unconditional use of regenerators at each network site traversed by the optical signal. However, transparency also implies an increased accumulation

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Nonlinear cumulated phase as a criterion to assess performance of terrestrial WDM systems

Cited by 40 publications

References 2 publications

Parametric gain in the strongly nonlinear regime and its impact on 10-Gb/s NRZ systems with forward-error correction

Parametric gain in the strongly nonlinear regime and its impact on 10-Gb/s NRZ systems with forward-error correction

A Unified Design Framework for Single-Channel Dispersion-Managed Terrestrial Systems

A new method to plan more realistic optical transparent networks

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