1.1 Tb/s/λ at 9.8 bit/s/Hz DWDM transmission over DCI distances supported by CMOS DACs

Buchali, Fred; Lauinger, Vincent; Chagnon, Mathieu; Schuh, Karsten; Aref, Vahid

doi:10.1364/ofc.2020.th3e.2

Cited by 9 publications

(2 citation statements)

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“…Standards exist for 400 Gb/s [45] WDM optical interfaces and some vendors already offer digital signal processing (DSP) capabilities to support 800 Gb/s on a single wavelength [46], to increase the system capacity. Recent research works show the possibility of boosting the capacity further: In [47], 1.1 Tb/s was transmitted over a single wavelength, with a spectral efficiency of 9.8 bit/s/Hz, over a distance of 80 km, based on 64-quadrature amplitude modulation (QAM), probabilistic constellation shaping (PCS), and low-density parity check (LDPC) coding. Although the capacities and distances reported above for coherent systems are more than enough to fulfill even the most challenging requirements of 5G transport, dramatic cost reductions are necessary before they are suitable for this network segment; integrated photonics will again be the key enabling technology.…”

Section: Enabling Optical Transmission Technologiesmentioning

confidence: 99%

Optical transport for Industry 4.0 [Invited]

Sabella

Iovanna

Bottari

et al. 2020

J. Opt. Commun. Netw.

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Industry 4.0 represents a new industrial revolution that will dramatically change the landscape in many sectors, including manufacturing and logistics. Robotics, machine intelligence, and new forms of connectivity are key ingredients of this paradigm. 5G mobile networks are expected to play a crucial role, supporting a lower cost per transported bit in air and a lower latency compared with 4G. 5G radio ensures different performance levels in very heterogeneous coverage situations, including a mix of indoor and outdoor contexts. Mobile network evolution requires new transport networks to address the new challenging requirements: increasing transmission capacity, compatibility with latency-critical applications, significantly reduced cost with respect to conventional metro network segments, lower energy consumption, and, in some cases, switching capabilities. Optical communications and networking will play a key role in these new transport scenarios, where tailored transmission techniques and network architectures are needed. This paper discusses the requirements and challenges that Industry 4.0 scenarios pose to optical communications and networking architectures. Performance of optical transmission schemes, tailored to support these new radio access networks, are detailed and benchmarked. A network test bed, focused on transport for vertical use cases, is described. Experimental results demonstrate the compliance of the proposed optical transport network with a latency-critical cloud robotics application, which presents industry-grade connectivity needs.

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Section: Enabling Optical Transmission Technologiesmentioning

confidence: 99%

Optical transport for Industry 4.0 [Invited]

Sabella

Iovanna

Bottari

et al. 2020

J. Opt. Commun. Netw.

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“…The 4D modulation formats applications are investigated mainly for long-haul transmission [13], but have also been demonstrated to have advantages for metro networks applications in our previous work [10]. DWDM is an efficient way to increase overall capacity by allocating a huge amount of data to different wavelength channels and transmit them simultaneously [14][15][16][17][18][19]. The application of pulse shaping scheme, together with the DWDM system, can offer us better spectral efficiency [19].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Transmission of Four-Dimensional LDPC-Coded Modulation with Slepian Sequences for DSP-Free 40 km Metro Network Applications

Han

Djordjević

2022

Sensors

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The growing data demands are pushing researchers to pay more attention to spectrally efficient modulation formats. The four-dimensional (4D) signal constellation modulation format has been investigated for metro networks’ applications to achieve better power efficiency. To cope with such modulation formats, the requirement of better digital signal processing (DSP) is also increasing rapidly. More complicated DSPs bring us extra costs; thus, the DSP-free coherent receivers are also investigated because of the high-power consumption of conventional DSP-based receivers, but the transceivers upgrading also results in extra costs. In this invited paper we implement a 4-dimentional modulation format based on Slepian sequences. We applied LDPC coding and experimentally investigated the BER performance in a two-dimensional (2D) 40 km fiber link transmission and demonstrate that being error free is possible without employing the complicated DSP. We compared our proposed modulation scheme with regular 16QAM and found it outperforms 16QAM with DSP over back-to-back transmission by 3.8 dB improvement in OSNR when BER = 10−5, while over 40 km metro network communication link our proposed 4D modulation signals are still successfully transmitted, and the LDPC-coding still works properly with such a new transmission strategy. On the other hand, DSP-free transmission of LDPC-coded 16-QAM exhibits an early error floor phenomenon.

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Up to 115GBaud Faster Than Nyquist PDM-64QAM Based on Tomlinson-Harashima Precoding with Single DAC

Huang

Nakashima

Akiyama

et al. 2020

2020 European Conference on Optical Communications (ECOC)

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1.1 Tb/s/λ at 9.8 bit/s/Hz DWDM transmission over DCI distances supported by CMOS DACs

Abstract: We report on a 16-nm CMOS DAC based transmitter optimization enabling bitrates up to 1.15 Tb/s. We successfully demonstrate DWDM transmission over DCI distances up to 118 km at 1.1 Tb/s and spectral efficiencies of 9.8 bit/s/Hz.

Cited by 9 publications

References 1 publication

Optical transport for Industry 4.0 [Invited]

Optical transport for Industry 4.0 [Invited]

Two-Dimensional Transmission of Four-Dimensional LDPC-Coded Modulation with Slepian Sequences for DSP-Free 40 km Metro Network Applications

Up to 115GBaud Faster Than Nyquist PDM-64QAM Based on Tomlinson-Harashima Precoding with Single DAC

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