12.1 terabit/second data center interconnects using O-band coherent transmission with QD-MLL frequency combs

Santiago Bernal (), Mario Dumont, Essam Berikaa, Charles St-Arnault, Yixiang Hu, Ramon Gutierrez Castrejon, Weijia Li, Zixian Wei, Benjamin Krueger, Fabio Pittalà, John Bowers and David V. Plant
Additional contact information
Santiago Bernal: McGill University
Mario Dumont: University of California
Essam Berikaa: McGill University
Charles St-Arnault: McGill University
Yixiang Hu: McGill University
Ramon Gutierrez Castrejon: McGill University
Weijia Li: McGill University
Zixian Wei: McGill University
Benjamin Krueger: Keysight Technologies Deutschland GmbH
Fabio Pittalà: Keysight Technologies Deutschland GmbH
John Bowers: University of California
David V. Plant: McGill University

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract Most current Data Center Interconnects (DCI) use intensity modulation direct detection (IMDD) configurations due to their low complexity and cost. However, significant scaling challenges allow coherent solutions to become contenders in these short reach applications. We present an O-band coherent optical fiber transmission system based on Quantum Dot—Mode Locked Lasers (QD-MLLs) using two independent free-running comb lasers, one each for the carrier and the Local Oscillator (LO). Using a comb-to-comb configuration, we demonstrate a 10 km single mode fiber, O-band, coherent, heterodyne, 12.1 Tbps system operating at 0.47 Tbps/λ using 26 λs. We used fewer comb lines (26 λs), faster symbol rate (56 GBaud) and higher constellation cardinality (32 QAM) relative to the highest capacity C-band systems reported to date. Through design, analysis, and experimentation, we quantify the optimum comb line spacing for this use case. We compare potential configurations for increasing data center interconnect capacities whilst reducing power consumption, complexity, and cost.

Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-024-51682-2 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51682-2

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-51682-2

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().