Equalization enhanced phase noise in Nyquist-spaced superchannel transmission systems using multi-channel digital back-propagation

Xu, Tianhua; Liga, Gabriele; Lavery, Domaniç; Thomsen, Benn C.; Savory, Seb J.; Killey, Robert I.; Bayvel, Polina

doi:10.1038/srep13990

Cited by 39 publications

(44 citation statements)

References 54 publications

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“…As a result, compensation of CD and non-linearities (NL), i.e. self-phase modulation (SPM), cross-phase modulation (XPM) and four-wave mixing (FWM), is a point of high interest from past few years29. On the other hand, multi-carrier signal transmission has attracted much attention3031.…”

Section: State Of the Artmentioning

confidence: 99%

Advanced and flexible multi-carrier receiver architecture for high-count multi-core fiber based space division multiplexed applications

Asif

2016

Sci Rep

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Space division multiplexing (SDM), incorporating multi-core fibers (MCFs), has been demonstrated for effectively maximizing the data capacity in an impending capacity crunch. To achieve high spectral-density through multi-carrier encoding while simultaneously maintaining transmission reach, benefits from inter-core crosstalk (XT) and non-linear compensation must be utilized. In this report, we propose a proof-of-concept unified receiver architecture that jointly compensates optical Kerr effects, intra- and inter-core XT in MCFs. The architecture is analysed in multi-channel 512 Gbit/s dual-carrier DP-16QAM system over 800 km 19-core MCF to validate the digital compensation of inter-core XT. Through this architecture: (a) we efficiently compensates the inter-core XT improving Q-factor by 4.82 dB and (b) achieve a momentous gain in transmission reach, increasing the maximum achievable distance from 480 km to 1208 km, via analytical analysis. Simulation results confirm that inter-core XT distortions are more relentless for cores fabricated around the central axis of cladding. Predominantly, XT induced Q-penalty can be suppressed to be less than 1 dB up-to −11.56 dB of inter-core XT over 800 km MCF, offering flexibility to fabricate dense core structures with same cladding diameter. Moreover, this report outlines the relationship between core pitch and forward-error correction (FEC).

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Section: State Of the Artmentioning

confidence: 99%

Advanced and flexible multi-carrier receiver architecture for high-count multi-core fiber based space division multiplexed applications

Asif

2016

Sci Rep

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“…The optical fibre communication systems will be more severely degraded by EEPN, with the increase of chromatic dispersion, symbol rate, system bandwidth, laser 3-dB linewidth (Tx or LO), and modulation format [41][42][43][44]. The effects of EEPN have been studied for single-channel, WDM, OFDM, pre-distortion of dispersion, and multi-mode fibre transmission networks [45][46][47][48][49]. Also, research has been implemented to study the performance of EEPN in the CPE in long-haul optical transmission systems [50][51][52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

Carrier phase estimation in dispersion-unmanaged optical transmission systems

Bayvel

Liu

et al. 2017

2017 IEEE 2nd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)

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Abstract-The study on carrier phase estimation (CPE) approaches, involving a one-tap normalized least-mean-square (NLMS) algorithm, a block-wise average algorithm, and a Viterbi-Viterbi algorithm has been carried out in the long-haul high-capacity dispersion-unmanaged coherent optical systems. The close-form expressions and analytical predictions for biterror-rate behaviors in these CPE methods have been analyzed by considering both the laser phase noise and the equalization enhanced phase noise. It is found that the Viterbi-Viterbi algorithm outperforms the one-tap NLMS and the block-wise average algorithms for a small phase noise variance (or effective phase noise variance), while the three CPE methods converge to a similar performance for a large phase noise variance (or effective phase noise variance). In addition, the differences between the three CPE approaches become smaller for higher-level modulation formats.

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“…compensating only for intra-channel nonlinearities (self-phase modulation), has been suggested as a low-complexity compensation scheme which may realise potential cost savings in newly deployed systems [29][30][31]. Nevertheless, for a substantial increase in the achievable information rates, multi-channel DBP (MC-DBP) has been widely considered as a promising approach as it compensates for both intra-channel and inter-channel fibre nonlinearities in dense wavelength division multiplexed (WDM) optical communication systems [32][33][34][35][36][37][38][39]. In this paper, the performance and the optimisation of MC-DBP is discussed from the perspectives of signal-to-noise ratio (SNR) and AIR enhancement in the compensated fibre-optic communication systems, where different high-cardinality modulation formats such as dual-polarisation quadrature phase shift keying (DP-QPSK), dual-polarisation 16-level quadrature amplitude modulation (DP-16QAM), DP-64QAM and DP-256QAM, are applied.…”

Section: Introductionmentioning

confidence: 99%

Digital nonlinearity compensation in high-capacity optical fibre communication systems: Performance and optimisation

Shevchenko

Karanov

et al. 2017

2017 Advances in Wireless and Optical Communications (RTUWO)

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Copies of full items can be used for personal research or study, educational, or not-for profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way.Publisher's statement: "© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works." A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. Abstract-Meeting the ever-growing information rate demands has become of utmost importance for optical communication systems. However, it has proven to be a challenging task due to the presence of Kerr effects, which have largely been regarded as a major bottleneck for enhancing the achievable information rates in modern optical communications. In this work, the optimisation and performance of digital nonlinearity compensation are discussed for maximising the achievable information rates in spectrallyefficient optical fibre communication systems. It is found that, for any given target information rate, there exists a trade-off between modulation format and compensated bandwidth to reduce the computational complexity requirement of digital nonlinearity compensation.

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Equalization enhanced phase noise in Nyquist-spaced superchannel transmission systems using multi-channel digital back-propagation

Cited by 39 publications

References 54 publications

Advanced and flexible multi-carrier receiver architecture for high-count multi-core fiber based space division multiplexed applications

Advanced and flexible multi-carrier receiver architecture for high-count multi-core fiber based space division multiplexed applications

Carrier phase estimation in dispersion-unmanaged optical transmission systems

Digital nonlinearity compensation in high-capacity optical fibre communication systems: Performance and optimisation

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