Signaling on the continuous spectrum of nonlinear optical fiber

Tavakkolnia, Iman; Safari, Majid

doi:10.1364/oe.25.018685

Cited by 17 publications

(9 citation statements)

References 45 publications

(130 reference statements)

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“…In principle all degrees-of-freedom can be modulated. Prior work has mostly focused on either continuous spectrum modulation [6][7][8][9][10], or discrete spectrum modulation [6]. Transmission based on NFT has been experimentally demonstrated for the continuous spectrum [11][12][13], discrete spectrum [14], as well as the full spectrum [15].…”

Section: Introductionmentioning

confidence: 99%

Polarization-division multiplexing based on the nonlinear Fourier transform

Goossens¹,

Yousefi²,

Jaouën³

et al. 2017

Opt. Express

103

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Polarization-division multiplexed (PDM) transmission based on the nonlinear Fourier transform (NFT) is proposed for optical fiber communication. The NFT algorithms are generalized from the scalar nonlinear Schrödinger equation for one polarization to the Manakov system for two polarizations. The transmission performance of the PDM nonlinear frequency-division multiplexing (NFDM) and PDM orthogonal frequency-division multiplexing (OFDM) are determined. It is shown that the transmission performance in terms of Q-factor is approximately the same in PDM-NFDM and single polarization NFDM at twice the data rate and that the polarization-mode dispersion does not seriously degrade system performance. Compared with PDM-OFDM, PDM-NFDM achieves a Q-factor gain of 6.4 dB. The theory can be generalized to multi-mode fibers in the strong coupling regime, paving the way for the application of the NFT to address the nonlinear effects in space-division multiplexing.

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Section: Introductionmentioning

confidence: 99%

Polarization-division multiplexing based on the nonlinear Fourier transform

Goossens¹,

Yousefi²,

Jaouën³

et al. 2017

Opt. Express

103

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“…Again, D P = 0.4 ps/ √ km is considered as the PMD parameter of optical fiber. Apart from sampling the CS for detection, the performance with the linear filtering method, introduced in [8], is also presented, which is expected to improve the performance. For the linear filtering method, 18 samples per symbol are calculated by NFT.…”

Section: Numerical Analysismentioning

confidence: 99%

“…In NFT-based optical communication, systems can be defined based on data transmission over the continuous spectrum (CS) [8], [9], the discrete spectrum (DS) [10]- [13] or both spectra [14]- [16]. Signalling on the CS is an attractive approach since the CS basically consists of a continuous complex waveform, and thus many known conventional communication techniques can be applied.…”

Section: Introductionmentioning

confidence: 99%

The Impact of PMD on Single-Polarization Nonlinear Frequency Division Multiplexing

Tavakkolnia

Safari

2019

J. Lightwave Technol.

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The impact of polarization mode dispersion (PMD) is studied on the single-polarization signal transmission over the continuous spectrum (CS) of a long-haul optical fiber link defined by nonlinear Fourier transform (NFT). It is shown that a linear all-order PMD compensation can reverse most of PMD effects in the temporal domain. However, due to the nonlinear interaction of the two polarization modes, the CS is distorted in the nonlinear spectral domain. Simulation results are presented, and a perturbation model is proposed based on the simulation results to describe the impact of PMD for different modulation formats and fiber parameters. It is demonstrated that, after linear PMD compensation, the residual polarization-dependent effects generate a constellation rotation and additional noise in the nonlinear spectral domain. The performance of NFT-based system in the presence of both PMD and amplifier noise is also studied. The results show that the effect of PMD is small provided that an efficient linear PMD compensation is performed in time domain.

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“…After VNT, each individual channel is approximated with an additive white Gaussian noise (AWGN) model, hence simplifying the capacity estimation under peak power constraint [19]. In [20], the mentioned VNT technique is employed to generate a nonuniform spacing constellation, then the gain in signaling over CS is compared with the other signaling methods like NIS and CS domain matched filtering.…”

Section: Introductionmentioning

confidence: 99%