WDM Transmission of 3×1.12-Tb/s PDM-16QAM Superchannels with 6.5-b/s/Hz in a 162.5-GHz Flexible-Grid using only Optical Spectral Shaping

Carvalho, Luis H. H.; Floridia, Claudio; Franciscangelis, Carolina; Parahyba, Victor; Silva, Edson; González, Neil Guerrero; Oliveira, J. C. R. F.

doi:10.1364/ofc.2014.m3c.3

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…To minimize linear crosstalk penalties in multi-carrier transmissions, pulse shaping techniques to constraint modulated bandwidth have been explored, such as digital Nyquist filtering [4] and optical pre-filtering [5][6][7]. The benefits of those techniques have been experimentally assessed in long haul optical transmission systems.…”

Section: Introductionmentioning

confidence: 99%

Impairment mitigation in superchannels with digital backpropagation and MLSD

Silva¹,

Larsen²,

Zibar³

2015

Opt. Express

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We assess numerically the performance of single-carrier digital backpropagation (SC-DBP) and maximum-likelihood sequence detection (MLSD) for DP-QPSK and DP-16QAM superchannel transmission over dispersion uncompensated links for three different cases of spectral shaping: optical pre-filtering of RZ and NRZ spectra, and digital Nyquist filtering. We investigate the limits for carrier proximity of each spectral shaping technique and the correspondent performance behavior of each algorithm, for both modulation formats. For superchannels with carrier spacing close to the Nyquist limit, it is shown that the maximum performance improvement of 1.0 dB in Q 2 -factor is provided by those algorithms. However, such gain can be highly reduced when the order of the modulation format increases.

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Section: Introductionmentioning

confidence: 99%

Impairment mitigation in superchannels with digital backpropagation and MLSD

Silva¹,

Larsen²,

Zibar³

2015

Opt. Express

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“…and 110 Gbaud using DP QPSK (440 Gb/s) [7]. For 1 Tb/s superchannel signals, recent demonstrations of high symbol rate modulation include DP 8-QAM and 9 subcarriers with a baud rate of 23 Gbaud (1.242 Tb/s) [8]; DP 16-QAM and DP 8-QAM and 8 subcarriers with a baud rate of 24.8 Gbaud (1.5872 Tb/s and 1.1904 Tb/s, respectively) [13]; DP 16-QAM and 5 subcarriers with a baud rate of 28 Gbaud (1.12 Tb/s) [14]; DP 16-QAM and 4 subcarriers with baud rates of 36 Gbaud (1.152 Tb/s) [17], 39 Gbaud (1.248 Tb/s) [11] and 40 Gbaud (1.28 Tb/s) [10]; DP 16-QAM and 3 subcarriers with baud rates of 46 Gbaud (1.104 Tb/s) [12] and 50.25 Gbaud (1.206 Tb/s) [4]; DP 32-QAM and 3 subcarriers with a baud rate of 46 Gbaud (1.38 Tb/s) [16]; and DP 16-QAM and 2 subcarriers with baud rates of 80 Gbaud (1.28 Tb/s) [6]. The number of optical subcarriers, the bit rate per subcarrier, and the modulation format are important aspects of superchannel design.…”

Section: Introductionmentioning

confidence: 99%

Transmission Performance of 448 Gb/s Single-Carrier and 1.2 Tb/s Three-Carrier Superchannel Using Dual-Polarization 16-QAM With Fixed LUT Based MAP Detection

Rezania

Cartledge

2015

J. Lightwave Technol.

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Transmission of single-carrier 448 Gb/s dualpolarization 16-ary quadrature-amplitude-modulation (DP 16-QAM) electrical time-division multiplexing (ETDM) signal and a 1.206 Tb/s three-carrier superchannel ETDM signal using DP 16-QAM is demonstrated by applying a fixed look-up table (LUT) based on maximum-a-posteriori (MAP) detection. The MAP detector is used to mitigate the effect of pattern dependent distortion in the transmitted signal arising from the high symbol rates. Different decision rules for the MAP detector are considered based on multiple observations of the same symbol as the detection window advances through the received symbol sequence. The back-to-back optical signal-to-noise ratios for a bit error ratio of 10 −3 are 26.9 dB and 26.4 dB for the 448 Gb/s signal (12% overhead with 7% for forward error correction (FEC) coding overhead) and 1.206 Tb/s superchannel signal (20% overhead with 15% for FEC coding overhead), respectively. Compared to conventional MAP detection, a 7-symbol minimum distance MAP detector reduces the required OSNR by about 0.8 dB and 1 dB at the FEC thresholds of 3.8 × 10 −3 and 1.9 × 10 −2 for the 448 Gb/s signal and 1.206 Tb/s superchannel signal, respectively. Transmission over 1200 and 1500 km of standard single-mode fiber with EDFA amplification is achieved for the 448 Gb/s signal and 1.206 Tb/s superchannel signal, respectively.Index Terms-Quadrature amplitude modulation, maximuma-posteriori detection, superchannel 0733-8724 (c)

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“…Terabit-per-second superchannels provide a means to efficiently meet the growing demand for optical fiber transmission capacity 1 . A superchannel is comprised of several optical subcarriers but considered as a single entity with the subcarriers being routed through a network as a single group.…”

Section: Introductionmentioning

confidence: 99%

“…Recent demonstrations of 1 Tbit/s superchannel signals include DP 16-QAM and 5 subcarriers with a baud rate of 28 Gbaud (1.12 Tb/s) 1 ; DP 16-QAM and 3 subcarriers with a baud rate of 50.25 Gbaud (1.206 Tb/s) 3 ; and DP 32-QAM and a single carrier with a baud rate of 124 Gbaud (1.24 Tb/s) 4 . The number of optical subcarriers and the bit rate per subcarrier are important aspects of superchannel design.…”

Section: Introductionmentioning

confidence: 99%

Impact of intra- and inter-subcarrier nonlinearities on the information rate of a 1.206 Tbit/s DP 16-QAM superchannel

Rezania

Kashi

Cartledge

2015

2015 European Conference on Optical Communication (ECOC)

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WDM Transmission of 3×1.12-Tb/s PDM-16QAM Superchannels with 6.5-b/s/Hz in a 162.5-GHz Flexible-Grid using only Optical Spectral Shaping

Abstract: We demonstrated the transmission of 3x1.12-Tb/s superchannels (5x224-Gb/s PDM-16QAM) in 162.5-GHz flexible-grid, 6.5-b/s/Hz SE, using only optical spectral shaping, over SSMF-EDFA link. A maximum reach of 600-km with 3-ROADM passes was obtained employing nonlinear compensation.

Cited by 6 publications

References 7 publications

Impairment mitigation in superchannels with digital backpropagation and MLSD

Impairment mitigation in superchannels with digital backpropagation and MLSD

Transmission Performance of 448 Gb/s Single-Carrier and 1.2 Tb/s Three-Carrier Superchannel Using Dual-Polarization 16-QAM With Fixed LUT Based MAP Detection

Impact of intra- and inter-subcarrier nonlinearities on the information rate of a 1.206 Tbit/s DP 16-QAM superchannel

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