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Spectrally Efficient 168 Gb/s/λ WDM 64-QAM Single-Sideband Nyquist-Subcarrier Modulation With Kramers–Kronig Direct-Detection Receivers

Li, Z; Erkilinc, MS; Shi, K; Sillekens, E; Galdino, L; Xu, T; Thomsen, BC; ... Killey, RI; + view all (2018) Spectrally Efficient 168 Gb/s/λ WDM 64-QAM Single-Sideband Nyquist-Subcarrier Modulation With Kramers–Kronig Direct-Detection Receivers. Journal of Lightwave Technology , 36 (6) pp. 1340-1346. 10.1109/JLT.2017.2785858. Green open access

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Abstract

Due to their simple and cost-effective transceiver architecture, single-polarization and single-photodiode-based directdetection (DD) systems offer advantages for metropolitan area network and data-center interconnect applications. Single-sideband subcarrier modulation (SSB SCM) signaling with DD has the potential to achieve high information spectral density (ISD) but its performance can be significantly degraded by signal–signal beat interference (SSBI). The recently proposed Kramers–Kronig (KK) digital signal processing scheme is effective in eliminating the SSBI penalty. Through the use of the KK scheme, we achieved 4 × 168 Gb/s wavelength division multiplexing DD SSB 64-QAM Nyquist-SCM signal transmission over 80 km of uncompensated standard single-mode fiber at a net ISD of up to 4.61 (b/s)/Hz. The joint optimization of the optical carrier-to-signal power ratio and the KK algorithm sampling rate is described.

Type: Article
Title: Spectrally Efficient 168 Gb/s/λ WDM 64-QAM Single-Sideband Nyquist-Subcarrier Modulation With Kramers–Kronig Direct-Detection Receivers
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2017.2785858
Publisher version: https://doi.org/10.1109/JLT.2017.2785858
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Keywords: Data center interconnect, digital linearization, direct detection, Kramers–Kronig receiver, metro networks, Nyquist-pulse shaped subcarrier modulation, receiver-based electronic dispersion compensation, signal–signal beat interference, spectrally efficient wavelength division multiplexing, Optical receivers, Optical transmitters, Optical fibers, Optical attenuators, Amplitude modulation, Optical filters
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10045369
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