Twin-Wave-Based Optical Transmission With Enhanced Linear and Nonlinear Performances

Liu, Xiang

doi:10.1109/jlt.2014.2383317

Cited by 21 publications

(6 citation statements)

References 30 publications

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“…A transmission scheme for nonlinearity mitigation that resembles PSA-amplified links is the phase-conjugated twin waves (PCTW) scheme [7][8][9]. In similarity to PSA-amplified links, two waves are transmitted, the signal and a conjugated copy of the signal, and the nonlinear distortion is mitigated by performing a coherent superposition of the two waves [7].…”

Section: Mitigation Of Nonlinear Distortion In Hybrid Raman/phase-senmentioning

confidence: 99%

Mitigation of nonlinear distortion in hybrid Raman/phase-sensitive amplifier links

Eliasson¹,

Olsson²,

Karlsson³

et al. 2016

Opt. Express

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Hybrid systems combining distributed Raman amplification and phase-sensitive amplifiers (PSAs) are investigated in numerical simulations. We focus on the mitigation of fiber nonlinearities and the impact of the span power map which is also important in systems employing optical phase conjugation or phase-conjugated twin waves. We simulate multi-span PSA links with and without distributed Raman amplification and show that by including distributed Raman amplification, the transmission distance increases more at optimum launch power than in the linear regime. For a 5-channel WDM QPSK PSA-amplified system, we observe a transmission reach increase by a factor of 8.1 by including ideal distributed Raman amplification.

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Section: Mitigation Of Nonlinear Distortion In Hybrid Raman/phase-senmentioning

confidence: 99%

Mitigation of nonlinear distortion in hybrid Raman/phase-sensitive amplifier links

Eliasson¹,

Olsson²,

Karlsson³

et al. 2016

Opt. Express

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“…More importantly, at high launch powers, the performance of the 16-QAM-PCTW technique is greatly limited because of the addition of the higher-order perturbative nonlinear distortion terms. The PCTW technique, in theory, is not capable of canceling the higher-order nonlinear distortion terms effectively and is experimentally demonstrated in [7].…”

Section: Simulation Resultsmentioning

confidence: 99%

“…However, the PCSC technique does not provide any significant performance improvement without 50% pre-EDC in the transmission link [6]. This is essentially a limiting factor for the implementation of the PCSC scheme in a dynamically routed optical network, where the exact dispersion symmetry in the link is difficult to achieve [7].…”

Section: Introductionmentioning

confidence: 99%

“…Evidently, the constellation quality is much improved through the coherent superposition of the two PCTWs. It is well reported in [7] that the performance gain (or sensitivity gain) obtained through the PCTW technique in the linear regime is 3 dB. This is because of halving the variance of the linear noise resulting from the amplified spontaneous emission (ASE), by coherently mixing two PCTWs.…”

Section: Introductionmentioning

confidence: 99%

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A spectrally-efficient linear polarization coding scheme for fiber nonlinearity compensation in CO-OFDM systems

et al. 2017

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In this paper, we propose a linear polarization coding scheme (LPC) combined with the phase conjugated twin signals (PCTS) technique, referred to as LPC-PCTS, for fiber nonlinearity mitigation in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. The LPC linearly combines the data symbols on the adjacent subcarriers of the OFDM symbol, one at full amplitude and the other at half amplitude. The linearly coded data is then transmitted as phase conjugate pairs on the same subcarriers of the two OFDM symbols on the two orthogonal polarizations. The nonlinear distortions added to these subcarriers are essentially anti-correlated, since they carry phase conjugate pairs of data. At the receiver, the coherent superposition of the information symbols received on these pairs of subcarriers eventually leads to the cancellation of the nonlinear distortions. We conducted numerical simulation of a single channel 200 Gb/s CO-OFDM system employing the LPC-PCTS technique. The results show that a Q-factor improvement of 2.3 dB and 1.7 dB with and without the dispersion symmetry, respectively, when compared to the recently proposed phase conjugated subcarrier coding (PCSC) technique, at an average launch power of 3 dBm. In addition, our proposed LPCPCTS technique shows a significant performance improvement when compared to the 16-quadrature amplitude modulation (QAM) with phase conjugated twin waves (PCTW) scheme, at the same spectral efficiency, for an uncompensated transmission distance of 2800 km.

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“…CS enhances the signal to noise ratio of the signal, since the signals add coherently, but random noise adds incoherently. It is also possible to "twin" a signal with its phase conjugated copy in any other orthogonal dimension rather than polarization state [10]. In particular, one may "twin" a signal and its phase conjugated copy in different time segments as:…”

mentioning

confidence: 99%

Optical and Digital Phase Conjugation Techniques for Fiber Nonlinearity Compensation

McCarthy

Turitsyn

et al. 2015

2015 Opto-Electronics and Communications Conference (OECC)

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Twin-Wave-Based Optical Transmission With Enhanced Linear and Nonlinear Performances

Cited by 21 publications

References 30 publications

Mitigation of nonlinear distortion in hybrid Raman/phase-sensitive amplifier links

Mitigation of nonlinear distortion in hybrid Raman/phase-sensitive amplifier links

A spectrally-efficient linear polarization coding scheme for fiber nonlinearity compensation in CO-OFDM systems

Optical and Digital Phase Conjugation Techniques for Fiber Nonlinearity Compensation

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