Analysis and Experimental Demonstration of Orthant-Symmetric Four-dimensional 7 bit/4D-sym Modulation for Optical Fiber Communication

Bin Chen (Corresponding author), Alex Alvarado, Sjoerd van der Heide, Menno van den Hout, Hartmut Hafermann, Chigo M. Okonkwo

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Abstract

We propose a new four-dimensional orthant-symmetric 128-Ary modulation format (4D-OS128) with a spectral efficiency of 7 bit/4D-sym. The proposed format fills the gap between polarization-multiplexed 8-and 16-Ary quadrature-Amplitude modulation (PM-8QAM and PM-16QAM). Numerical simulations show that 4D-OS128 outperforms two well-studied 4D geometrically-shaped modulation formats: 128SP-16QAM and 7b4D-2A8PSK by up to 0.65 dB for bit-interleaved coded modulation at the same spectral efficiency. These gains are experimentally demonstrated in a 11×233 Gbit/s wavelength division multiplexing (WDM) transmission system operating at 5.95 bit/4D-sym over 6000 and 9000 km for both EDFA-only and hybrid amplification scenarios, respectively. A reach increase of 15% is achieved with respect to 128-Ary set-partitioning 16QAM. Furthermore, the proposed 4D-OS128 is also compared to $\boldsymbol{D}_4$ lattice-based constellation, 16QAM and probabilistically-shaped 16QAM with finite blocklength via simulation.

Original languageEnglish
Article number9345386
Pages (from-to)2737-2753
Number of pages17
JournalJournal of Lightwave Technology
Volume39
Issue number9
DOIs
Publication statusPublished - 1 May 2021

Funding

Manuscript received March 23, 2020; revised June 16, 2020, August 25, 2020, November 13, 2020, and January 26, 2021; accepted January 29, 2021. Date of publication February 2, 2021; date of current version May 2, 2021. This work was supported in part by Huawei France through the NLCAP Project. The work of Bin Chen was supported in part by the National Natural Science Foundation of China (NSFC) under Grant 61701155, in part by the Fundamental Research Funds for the Central Universities under Grant JZ2020HGTB0015, and in part by Anhui Provincial Natural Science Foundation under Grant 2008085QF282. The work of Alex Alvarado was supported by the Netherlands Organisation for Scientific Research (NWO) via VIDI Grant ICONIC (Project 15685). The work of Sjoerd van der Heide, Menno van den Hout, and Chigo Okonkwo was supported in part by the Dutch NWO Gravitation Program: Research centre for Integrated Nanophotonics under Grant 024.002.033. (Corresponding author: Bin Chen.) Bin Chen is with the School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230052, China, and also with the Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands (e-mail: b.c.chen@tue.nl).

FundersFunder number
Huawei France
National Natural Science Foundation of China61701155
Nederlandse Organisatie voor Wetenschappelijk Onderzoek15685, 024.002.033
Natural Science Foundation of Anhui Province2008085QF282
Fundamental Research Funds for the Central UniversitiesJZ2020HGTB0015

    Keywords

    • Labeling
    • Modulation
    • Nonlinear optics
    • Optical modulation
    • Optical polarization
    • Optimization
    • Quadrature amplitude modulation

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