Opportunities for Optical Access Network Transceivers Beyond OOK [Invited]

Lavery, Domaniç; Gerard, Thomas; Erkilinç, Sezer; Liu, Zhixin; Galdino, Lídia; Bayvel, Polina; Killey, Robert I.

doi:10.1364/jocn.11.00a186

Cited by 27 publications

(12 citation statements)

References 27 publications

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“…This allows parallel transmission of data in both polarization modes. For reasons discussed in [24], it is desirable to minimise the optical complexity of the receivers used in the ONU, which can be achieved by sacrificing polarization diversity. In this paper, we present two architectures which achieve this simplification.…”

Section: A Transceiver Designmentioning

confidence: 99%

Coded Modulation for 100G Coherent EPON

Gerard

Dzieciol

Sillekens

et al. 2020

J. Lightwave Technol.

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Geometrically shaped (GS) 8-, 16, and 32-ary modulation formats are investigated for use in coherent passive optical networks. The modulation formats are designed to improve receiver sensitivity when paired with a binary, soft-decision forward error correction code (SD-FEC), such as a low density parity check (LDPC). Herein we consider the LDPC code specified in the draft 50G EPON standard, and show how this type of code can be particularly advantageous in a coherent transmission system. A receiver sensitivity of −26.7 dBm is achieved at a post-FEC bit error rate below 3.8×10 −6 for a polarizationscrambled 32-ary GS modulation format at 25 GBd, received using a single-polarization, phase-diverse coherent receiver. This yielded a bit rate of 100 Gbit/s, net of coding and pilot overhead. This modulation format was shown to perform equally well in transmission, with no observed dispersion penalty after 80 km standard single mode fiber. Finally, this modulation format was received, at a reduced data rate of 50 Gbit/s, using a heterodyne coherent receiver based on a single balanced photodiode. The receiver sensitivity for this simplified receiver configuration was −28.5 dBm, yielding a power budget of 34.2 dB.

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Section: A Transceiver Designmentioning

confidence: 99%

Coded Modulation for 100G Coherent EPON

Gerard

Dzieciol

Sillekens

et al. 2020

J. Lightwave Technol.

Self Cite

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“…Also suppose that the FEC code enables the receiver to decode the signal with a negligible error-rate, provided that the SNR does not exceed a threshold ζ. This is an abstraction of UOWC channels implemented with standard modulation techniques, such as the on-off keying (OOK) and the quadrature amplitude modulation (QAM) [35].…”

Section: Modelmentioning

confidence: 99%

Global Optimization of Relay Placement for Seafloor Optical Wireless Networks

Inoue

Kodama

Kimura

2020

Preprint

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Optical wireless communication is a promising technology for underwater broadband access networks, which are particularly important for high-resolution environmental monitoring applications. This paper focuses on a deep sea monitoring system, where an underwater optical wireless network is deployed on the seafloor. We model such an optical wireless network as a general queueing network and formulate an optimal relay placement problem, whose objective is to maximize the stability region of the whole system, i.e., the supremum of the traffic volume that the network is capable of accommodating. The formulated optimization problem is further shown to be non-convex, so that its global optimization is non-trivial. In this paper, we develop a global optimization method for this problem and we provide an efficient algorithm to compute an optimal solution. Through numerical evaluations, we show that a significant performance gain can be obtained by using the derived optimal solution.

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“…There are many more ways to configure a coherent PON based on more complicated ONU structures, and these are discussed in [10], and references therein.…”

Section: From Ng-pon2 To "Coherent Pon1"mentioning

confidence: 99%