The impact of phase conjugation on the nonlinear-Shannon limit: The difference between optical and electrical phase conjugation

Ellis, A.D.; Le, Son Thai; Al-Khateeb, Mohammad; Turitsyn, Sergei K.; Liga, Gabriele; Lavery, Domaniç; Xu, Tianhua; Bayvel, Polina

doi:10.1109/phosst.2015.7248271

Cited by 14 publications

(6 citation statements)

References 11 publications

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“…The model treats the field propagating in the fiber as a summation of signal and noise fields, incorporating the signal-ASE noise interaction as a form of cross channel interference. Similar to [12] the symbol SNR (signal-to-noise ratio) at the receiver is approximated as…”

Section: Model Of Transmission Performance Using Digital Nonlineamentioning

confidence: 99%

The Benefit of Split Nonlinearity Compensation for Single-Channel Optical Fiber Communications

Lavery

Ives

Liga

et al. 2016

IEEE Photon. Technol. Lett.

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In this Letter we analyze the benefit of digital compensation of fiber nonlinearity, where the digital signal processing is divided between the transmitter and receiver. The application of the Gaussian noise model indicates that, where there are two or more spans, it is always beneficial to split the nonlinearity compensation. The theory is verified via numerical simulations, investigating transmission of single channel 50 GBd polarization division multiplexed 256-ary quadrature amplitude modulation over 100 km standard single mode fiber spans, using lumped amplification. For this case, the additional increase in mutual information achieved over transmitter-or receiver-side nonlinearity compensation is approximately 1 bit for distances greater than 2000 km. Further, it is shown, theoretically, that the SNR gain for long distances and high bandwidth transmission is 1.5 dB versus transmitter-or receiver-based nonlinearity compensation.

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Section: Model Of Transmission Performance Using Digital Nonlineamentioning

confidence: 99%

The Benefit of Split Nonlinearity Compensation for Single-Channel Optical Fiber Communications

Lavery

Ives

Liga

et al. 2016

IEEE Photon. Technol. Lett.

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“…The model treats the field propagating in the fiber as a summation of signal and noise fields, incorporating the signal-ASE noise interaction as a form of cross channel interference. Similar to [13] the SNR at the receiver is approximated as…”

Section: Model Of Transmission Performance Usingmentioning

confidence: 99%

The benefit of split nonlinearity compensation for single channel optical fiber communications

Lavery

Ives

Liga

et al. 2016

2016 IEEE Photonics Conference (IPC)

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Abstract-In this letter, we analyze the benefit of digital compensation of fiber nonlinearity, where the digital signal processing is divided between the transmitter and the receiver. The application of the Gaussian noise model indicates that, where there are two or more spans, it is always beneficial to split the nonlinearity compensation. The theory is verified via numerical simulations, investigating the transmission of a single-channel 50-GBd polarization division multiplexed 4-and 256-ary quadrature amplitude modulation signals over 100-km standard singlemode fiber spans, using lumped amplification. It is shown, theoretically, that the signal-to-noise ratio gain for long distances and high bandwidth transmission is 1.5 dB versus transmitteror receiver-based nonlinearity compensation.

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“…Long-haul high-capacity optical fibre networks can be seriously deteriorated by physical impairments in the transmission systems, e.g. chromatic dispersion (CD), polarization mode dispersion, laser phase noise (PN) and fibre nonlinearities [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Since the compensation and mitigation of these system impairments can be implemented in electrical domain, the combination of coherent optical detection, advanced modulation formats and digital signal processing (DSP) has become one of the most popular and promising solution for new-generation long-haul and metro optical communication networks to perform close to the limit of Shannon capacity, based on the knowledge of signal amplitude and phase [21][22][23][24][25][26][27][28][29].…”

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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The impact of phase conjugation on the nonlinear-Shannon limit: The difference between optical and electrical phase conjugation

Abstract: Abstract-We show that optical and electrical phase conjugation enable effective nonlinear compensation, The impact of polarization mode dispersion and finite processing bandwidth on the ultimate limits are also considered.

Cited by 14 publications

References 11 publications

The Benefit of Split Nonlinearity Compensation for Single-Channel Optical Fiber Communications

The Benefit of Split Nonlinearity Compensation for Single-Channel Optical Fiber Communications

The benefit of split nonlinearity compensation for single channel optical fiber communications

Carrier phase estimation in dispersion-unmanaged optical transmission systems

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