10.66 Peta-Bit/s Transmission over a 38-Core-Three-Mode Fiber

Rademacher, Georg; Puttnam, Benjamin J.; Luís, Ruben S.; Shen, Jun; Klaus, Werner; Eriksson, Tobias A.; Awaji, Yoshinari; Hayashi, Tetsuya; Nagashima, Toru; Nakanishi, Tetsuya; Taru, Toshiki; Takahata, Tomoyuki; Kobayashi, T.; Furukawa, Hideaki; Wada, Naoya

doi:10.1364/ofc.2020.th3h.1

Cited by 105 publications

(43 citation statements)

References 5 publications

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“…Different fiber types have been proposed for SDM, including coupled-core 5 and weakly coupled 6 single-mode multi-core fibers (MCF), few- 7 and multi-mode fibers (MMF) 8,9 , and their hybrid combinations few-mode multi-core fibers 10 . Until now, all transmission demonstrations that transmitted data rates of more than 1 peta-bit/s in a single fiber have relied on optical fibers with cladding diameters in excess of the current 125 μm standard [11][12][13][14][15][16][17][18][19] . Maintaining the current standard for cladding diameters is likely to be advantageous for economic reasons, as current cabling technologies may be applied.…”

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Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

et al. 2021

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Data rates in optical fiber networks have increased exponentially over the past decades and core-networks are expected to operate in the peta-bit-per-second regime by 2030. As current single-mode fiber-based transmission systems are reaching their capacity limits, space-division multiplexing has been investigated as a means to increase the per-fiber capacity. Of all space-division multiplexing fibers proposed to date, multi-mode fibers have the highest spatial channel density, as signals traveling in orthogonal fiber modes share the same fiber-core. By combining a high mode-count multi-mode fiber with wideband wavelength-division multiplexing, we report a peta-bit-per-second class transmission demonstration in multi-mode fibers. This was enabled by combining three key technologies: a wideband optical comb-based transmitter to generate highly spectral efficient 64-quadrature-amplitude modulated signals between 1528 nm and 1610 nm wavelength, a broadband mode-multiplexer, based on multi-plane light conversion, and a 15-mode multi-mode fiber with optimized transmission characteristics for wideband operation.

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Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

et al. 2021

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“…A series of Pb/s transmission experiments utilizing hybrid multiplexing technologies have been carried out in recent years [17-19, 191, 192]. In the study by Rademacher et al [20], a record transmission capacity of 10.66 Pb/s over 13 km was achieved with 114 spatial multiplicities through a 38-core three-mode fiber using C + L bands. Among various multiplexing and demultiplexing techniques, silicon-based (de)multiplexers have attracted a tremendous interest because of their ultracompact footprints, decent performance, and low cost.…”

Section: Silicon Photonic Devices For Fiber-optic Multiplexingmentioning

confidence: 99%

“…The data of commercial systems (including symbol rate, optical interface, WDM capacity and submarine systems) are extracted from [1,10] for 2000-2018 and from [11,12] for 2019-2020. The lab research results are extracted from [13][14][15][16][17][18][19][20]. WDM, wavelengthdivision multiplexing; SDM, space-division multiplexing; λ, wavelength.…”

Section: Introductionmentioning

confidence: 99%

Scaling capacity of fiber-optic transmission systems via silicon photonics

2020

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The tremendous growth of data traffic has spurred a rapid evolution of optical communications for a higher data transmission capacity. Next-generation fiber-optic communication systems will require dramatically increased complexity that cannot be obtained using discrete components. In this context, silicon photonics is quickly maturing. Capable of manipulating electrons and photons on the same platform, this disruptive technology promises to cram more complexity on a single chip, leading to orders-of-magnitude reduction of integrated photonic systems in size, energy, and cost. This paper provides a system perspective and reviews recent progress in silicon photonics probing all dimensions of light to scale the capacity of fiber-optic networks toward terabits-per-second per optical interface and petabits-per-second per transmission link. Firstly, we overview fundamentals and the evolving trends of silicon photonic fabrication process. Then, we focus on recent progress in silicon coherent optical transceivers. Further scaling the system capacity requires multiplexing techniques in all the dimensions of light: wavelength, polarization, and space, for which we have seen impressive demonstrations of on-chip functionalities such as polarization diversity circuits and wavelength- and space-division multiplexers. Despite these advances, large-scale silicon photonic integrated circuits incorporating a variety of active and passive functionalities still face considerable challenges, many of which will eventually be addressed as the technology continues evolving with the entire ecosystem at a fast pace.

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“…In this paper, we focus on the standard deviation metric because of its direct applicability in long-distance links [17]. In DSP-based MDL/MDG estimation, the channel transfer matrix H is usually estimated from the MIMO equalizer transfer function W [6], [12], [13]. The MMSE equalizer transfer function can be expressed as [18], [19]…”

Section: Estimationmentioning

confidence: 99%

“…et al use the coefficients of a 6 × 6 MIMO equalizer to estimate the MDL at different modal launch powers in a 3-mode transmission. Also, recently in [13], Rademacher et al estimate the MDL in a 38-core-3-mode transmission by employing a 6 × 6 MIMO equalizer to process each core.…”

Section: Introductionmentioning

confidence: 99%

DSP-based Mode-dependent Loss and Gain Estimation in Coupled SDM Transmission

Ospina

Okonkwo

Mello

2020

Optical Fiber Communication Conference (OFC) 2020

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The capacity in space division multiplexing (SDM) systems with coupled channels is fundamentally limited by mode-dependent loss (MDL) and mode-dependent gain (MDG) generated in components and amplifiers. In these systems, MDL/MDG must be accurately estimated for performance analysis and troubleshooting. Most recent demonstrations of SDM with coupled channels perform MDL/MDG estimation by digital signal processing (DSP) techniques based on the coefficients of multiple-input multiple-output (MIMO) adaptive equalizers. Although these methods provide a valid indication of the order of magnitude of the accumulated MDL/MDG over the link, MIMO equalizers are usually updated according to the minimum mean square error (MMSE) criterion, which is known to depend on the channel signal-to-noise ratio (SNR). Therefore, MDL/MDG estimation techniques based on the adaptive filter coefficients are also impaired by noise. In this paper, we model analytically the influence of the SNR on DSP-based MDL/MDG estimation, and show that the technique is prone to errors. Based on the transfer function of MIMO MMSE equalizers, and assuming a known SNR, we calculate a correction factor that improves the estimation process in moderate levels of MDL/MDG and SNR. The correction factor is validated by simulation of a 6mode long-haul transmission link, and experimentally using a 3-mode transmission link. The results confirm the limitations of the standard estimation method in scenarios of high additive noise and MDL/MDG, and indicate the correction factor as a possible solution in practical SDM scenarios.

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10.66 Peta-Bit/s Transmission over a 38-Core-Three-Mode Fiber

Abstract: We demonstrate transmission of 368-WDM-38-core-3-mode × 24.5-GBaud 64-and 256-QAM signals over 13 km. Record data-rate and spectral-efficiency of 1158.7 b/s/Hz were enabled by a low DMD 38-core-3-mode fiber with high uniformity amongst cores.

Cited by 105 publications

References 5 publications

Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

Scaling capacity of fiber-optic transmission systems via silicon photonics

DSP-based Mode-dependent Loss and Gain Estimation in Coupled SDM Transmission

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