A Reconfigurable OADM Architecture for High-Order Regular- and Offset- QAM based OFDM Super-Channels

Research output: Contribution to journalArticle

Abstract

We investigate the performance of a Reconfigurable All-Optical Add Drop Multiplexer (ROADM) architecture, that is suitable of supporting high-order regular and offset based QAM signals. The design is based on a highly modular interferometric, structure, in which OFDMA sub-channels remain in the optical domain. Sub-channel extraction is achieved via waveform splitting and coherent subtraction. Numerical studies have been carried out to validate performance and optimize critical parameters of the add/drop process. Particularly, input parameters like the signal extinction ratio, pulse rise time, switching window and input power levels have been optimized for single sub-carrier add/drop operation, from an OFDM super-channel comprising seven optical sub-carriers with 10 GHz spacing. Results have shown that the proposed ROADM architecture can accommodate and process both regular and offset based high-order QAM signals.
Original languageEnglish
Article number8667642
Pages (from-to)4008-4016
Number of pages9
JournalJournal of Lightwave Technology
Volume37
Issue number16
Early online date15 Mar 2019
DOIs
Publication statusPublished - 15 Aug 2019

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quadrature amplitude modulation
subtraction
waveforms
extinction
spacing
pulses

Bibliographical note

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Funding: Τhis work has been partially supported by the EU-ICT project
FOX-C (grant number 318415) and by the Engineering and Physical Sciences
Research Council (EPSRC) through PEACE (EP/L000091/1) and TRANSNET
(EP/R035342/1) projects.

Keywords

  • Add-drop multiplexing
  • OFDMA
  • QAM signals
  • coherent detection
  • optical superchannel

Cite this

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abstract = "We investigate the performance of a Reconfigurable All-Optical Add Drop Multiplexer (ROADM) architecture, that is suitable of supporting high-order regular and offset based QAM signals. The design is based on a highly modular interferometric, structure, in which OFDMA sub-channels remain in the optical domain. Sub-channel extraction is achieved via waveform splitting and coherent subtraction. Numerical studies have been carried out to validate performance and optimize critical parameters of the add/drop process. Particularly, input parameters like the signal extinction ratio, pulse rise time, switching window and input power levels have been optimized for single sub-carrier add/drop operation, from an OFDM super-channel comprising seven optical sub-carriers with 10 GHz spacing. Results have shown that the proposed ROADM architecture can accommodate and process both regular and offset based high-order QAM signals.",
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A Reconfigurable OADM Architecture for High-Order Regular- and Offset- QAM based OFDM Super-Channels. / Vlachos, Kyriakos; Marques Ferreira, Filipe; Sygletos, Stylianos.

In: Journal of Lightwave Technology, Vol. 37, No. 16, 8667642, 15.08.2019, p. 4008-4016.

Research output: Contribution to journalArticle

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