4000km Transmission of 50GHz spaced, 10⨉494.85-Gb/s Hybrid 32-64QAM using Cascaded Equalization and Training-Assisted Phase Recovery

Zhou, Quan; Nelson, .; Magill,; Zhu, Jun; Peckham,; Borel,; Carlson, '

doi:10.1364/ofc.2012.pdp5c.6

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…Peng et al [10] initially demonstrated the 4QAM&8QAM hybrid technique to transmit a 112-Gb/s single carrier ultra-dense WDM channel over a fixed 25-GHz spectrum grid. Zhou et al [11][12][13] demonstrated the TDHM technique using different modulation format combinations in several experiments and proved the possibility of placing 400-Gb/s signals on the conventional 50-GHz or 100-GHz channel grid. Zhuge et al [6][14] [15] successfully demonstrated the TDHM transmission in the environments of both fixed grids and future flex-grids by employing high-speed digital to analogue converters (DACs) at transmitters and low-complexity digital signal processors (DSPs) at receivers.…”

Section: A Literature Reviewmentioning

confidence: 99%

“…Constraint (11) ensures that for each node pair the number of established protection lightpath channels must be equal to the number of established working lightpath channels. Constraint (12) ensures that the number of established working lightpath channels does not exceed that of SBBP demand units required by users. Due to (11), this constraint inherently ensures that the number of established protection lightpath channels does not exceed that of the required SBPP demand units.…”

Section: Variablesmentioning

confidence: 99%

“…The recent emerging TDHM technique is promising to remedy the above disadvantage suffered by the discrete modulation scheme [5][6] [8][9][10][11][12][13][14][15][16]. By properly designing a TDM frame and allocating the time slot occupancy ratios of different modulation formats in the frame, the TDHM technique can achieve a continuous adaptation between spectral efficiency and transparent reach of an optical channel, which can assign the most spectrally efficient TDHM frame to match the physical layer transmission condition of an optical channel and therefore achieve the most efficient spectrum utilization.…”

Section: Introductionmentioning

confidence: 99%

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Explore Maximal Potential Capacity of WDM Optical Networks Using Time Domain Hybrid Modulation Technique

Dai

Shen

2015

J. Lightwave Technol.

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Abstract-The recent emerging time domain hybrid modulation (TDHM) technique is considered promising because it can realize continuous adaptation between spectral efficiency and transparent reach through appropriately allocating the time slot occupancy ratios of different modulation formats in a time-division multiplexing (TDM) frame. This technique is expected to achieve more efficient spectrum utilization or higher transmission capacity than the traditional transmission technique based on discrete modulation formats. For the point-to-point transmission system, the benefit of the TDHM technique has been experimentally verified. However, its benefit from the whole network perspective has not been explored yet. In this paper, we apply the TDHM technique to the optical network to maximize its transmission capacity. To evaluate the benefit of this technique, we consider the routing and wavelength assignment (RWA) problem for the TDHM-based WDM network, for which we develop an Integer Linear Programming (ILP) model and a waveplane-based heuristic algorithm to maximize the total network transmission capacity for the cases with and without network protection. For the protection case, the shared backup path protection (SBPP) technique is employed owing to its efficiency of spare capacity sharing and simplicity in network operation. The simulation study shows that compared to the design with discrete modulation formats, the TDHM-based approach can significantly increase the network transmission capacity. Index Terms-Time domain hybrid modulation (TDHM), rate adaptive optical network, waveplane-based heuristic algorithm, network capacityPart of the work was presented in ACP 2014 [32] and OFC 2015 [33].

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Section: A Literature Reviewmentioning

confidence: 99%

Section: Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Explore Maximal Potential Capacity of WDM Optical Networks Using Time Domain Hybrid Modulation Technique

Dai

Shen

2015

J. Lightwave Technol.

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“…The large-area low-loss fiber has also been studied in other advanced higher-order modulation format systems (for example, time-domain hybrid 32-64 QAM, for high SE 400 Gb/s ultra-long-haul transmission systems [13]), and it has been demonstrated that the 400 Gb/s-class DWDM signals on the standard 50 GHz ITU-T grid, which is 8.25 b/s/Hz net SE, were transmitted over 4000 km of large-area low-loss fiber with 100 km span length for a terrestrial optical network.…”

Section: Large-area Low-loss Fibersmentioning

confidence: 99%

Large-Area Low-Loss Fibers and Advanced Amplifiers for High-Capacity Long-Haul Optical Networks [Invited]

Zhu¹,

Peckham

McCurdy

et al. 2016

J. Opt. Commun. Netw.

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This paper reviews recent progress on ultralarge-area low-loss fibers for next-generation high-capacity terrestrial long-haul optical networks. The key optical fiber properties of new class fibers are described, and their impact on the transmission performance for 400 Gb/s polarization-multiplexed multilevel modulation coherent transmissions is discussed. The practical consideration of the large-area fibers, such as splicing and cabling for terrestrial transport systems, is also briefly addressed. In addition, we describe two advanced optical fiber amplifier technologies that will improve the efficiency in utilization of optical networking and reduce total system costs. The design and performance of an arrayed optical fiber amplifier using a compact ribbonized Er-doped fiber (EDF) for next-generation reconfigurable optical add/drop multiplexer nodes are discussed, and the performance characteristics of complementary Raman/EDFA, which has 70 nm bandwidth for seamless C+L-band transmissions, are described. Finally, we present the experimental demonstration of transmission of 34.6 Tb/s in 70 nm single band over 2400 km fiber.Index Terms-Coherent communications; Wavelengthdivision multiplexing (WDM).

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“…A net spectral efficiency of 8.25 bits/s/Hz has been demonstrated using time-domain hybrid QAM [9]. Each time division multiplexed frame allows for m-ary QAM signals with two different values of m. Using five frequency-locked subcarriers, the 494.85 Gb/s signal exhibited a bandwidth of 50 GHz.…”

Section: Offline Processingmentioning

confidence: 99%

Breakthroughs in Photonics 2012: Generation of Modulated Optical Signals for Optical Fiber Communications

Cartledge

Karar

2013

IEEE Photonics J.

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4000km Transmission of 50GHz spaced, 10⨉494.85-Gb/s Hybrid 32-64QAM using Cascaded Equalization and Training-Assisted Phase Recovery

Cited by 11 publications

References 2 publications

Explore Maximal Potential Capacity of WDM Optical Networks Using Time Domain Hybrid Modulation Technique

Explore Maximal Potential Capacity of WDM Optical Networks Using Time Domain Hybrid Modulation Technique

Large-Area Low-Loss Fibers and Advanced Amplifiers for High-Capacity Long-Haul Optical Networks [Invited]

Breakthroughs in Photonics 2012: Generation of Modulated Optical Signals for Optical Fiber Communications

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