Nonlinear Transmission Performance in Delay-Managed Few-Mode Fiber Links with Intermediate Coupling

2017 European Conference on Optical Communication (ECOC)

et al. 2017

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Section: Nonlinear Fmf Modelmentioning

confidence: 99%

Section: Nonlinear Fmf Modelmentioning

confidence: 99%

“…The fibre considered guides six linearly polarized (LP) modes: LP01, LP02, LP11a, LP11b, LP21a and LP21b, the same fibre considered in 3 . Tab.…”

Section: Fibre Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonlinear Compensation Using Digital Back-Propagation in Few-Mode Fibre Spans with Intermediate Coupling

2017 European Conference on Optical Communication (ECOC)

et al. 2017

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“…In the nonlinear regime, it has been shown that MDM systems performance can be dominated by inter-mode interactions for low DMD and low XT [15], and that high XT significantly reduces intermodal nonlinear [16]. However, in the intermediate coupling regime, the nature of the dependence of the nonlinear distortion on the (distributed) XT strength and DMD has only recently started being studied [10,17] for mode delay uncompensated and compensated links. A significant number of works assume systems operating in the strong mode coupling regime, e.g.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Performance of Few-Mode Fiber Links With Intermediate Coupling

et al. 2019

J. Lightwave Technol.

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this paper reviews and extends the study of nonlinear performance of few-mode fiber links operating in all different linear coupling regimes for different mode delay maps. The single-mode split-step Fourier method is modified to include semi-analytical solutions for linear mode coupling of arbitrary strength. The optimum link configurations minimizing the nonlinear penalty at practical levels of equalization complexity are presented, namely: the coupling strength required to give suppression of nonlinear distortion below the isolated propagation without mode coupling, for different mode delay maps. Finally, the limits of the extension of the single-mode Manakov approximation to the multi-mode case are accurately validated against a fully stochastic model developed considering distribution linear mode coupling.

Overcoming degradation in spatial multiplexing systems with stochastic nonlinear impairments

et al. 2018

Sci Rep

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Single-mode optical fibres now underpin telecommunication systems and have allowed continuous increases in traffic volume and bandwidth demand whilst simultaneously reducing cost- and energy-per-bit over the last 40 years. However, it is now recognised that such systems are rapidly approaching the limits imposed by the nonlinear Kerr effect. To address this, recent research has been carried out into mitigating Kerr nonlinearities to increase the nonlinear threshold and into spatial multiplexing to offer additional spatial pathways. However, given the complexity associated with nonlinear transmission in spatial multiplexed systems subject to random inter-spatial-path nonlinearities it is widely believed that these technologies are mutually exclusive. By investigating the linear and nonlinear crosstalk in few-mode fibres based optical communications, we numerically demonstrate, for the first time, that even in the presence of significant random mixing of signals, substantial performance benefits are possible. To achieve this, the impact of linear mixing on the Kerr nonlinearities should be taken into account using different compensation strategies for different linear mixing regimes. For the optical communication systems studied, we demonstrate that the performance may be more than doubled with the appropriate selection of compensation method for fibre characteristics which match those presented in the literature.