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Open AccessFeature PaperArticle

Free Space Intra-Datacenter Interconnects Based on 2D Optical Beam Steering Enabled by Photonic Integrated Circuits

Department of Informatics and Telecommunications, National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784 Athens, Greece
Department of Computer Architecture, Polytechnic University of Catalonia, C/Jordi Girona 1-3, 08034 Barcelona, Spain
Department of Informatics and Computer Engineering, University of West Attica, 12243 Aghiou Spiridonos, Greece
LioniX BV, P.O. Box 456, 7500 AL Enschede, The Netherlands
Thales Research & Technology, 1 Avenue Augustin Fresnel, 91767 Palaiseau CEDEX, France
Athens Information Technology (AIT), Monumental Plaza, 44 Kifisias Ave., Marousi, 15125 Athens, Greece
Author to whom correspondence should be addressed.
Photonics 2018, 5(3), 21;
Received: 27 June 2018 / Revised: 25 July 2018 / Accepted: 26 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Lightwave Communications and Optical Networks)
Data centers are continuously growing in scale and can contain more than one million servers spreading across thousands of racks; requiring a large-scale switching network to provide broadband and reconfigurable interconnections of low latency. Traditional data center network architectures, through the use of electrical packet switches in a multi-tier topology, has fundamental weaknesses such as oversubscription and cabling complexity. Wireless intra-data center interconnection solutions have been proposed to deal with the cabling problem and can simultaneously address the over-provisioning problem by offering efficient topology re-configurability. In this work we introduce a novel free space optical interconnect solution for intra-data center networks that utilizes 2D optical beam steering for the transmitter, and high bandwidth wide-area photodiode arrays for the receiver. This new breed of free space optical interconnects can be developed on a photonic integrated circuit; offering ns switching at sub-μW consumption. The proposed interconnects together with a networking architecture that is suitable for utilizing those devices could support next generation intra-data center networks, fulfilling the requirements of seamless operation, high connectivity, and agility in terms of the reconfiguration time. View Full-Text
Keywords: optical communications; optical beam steering; data center interconnects optical communications; optical beam steering; data center interconnects
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Chaintoutis, C.; Shariati, B.; Bogris, A.; Dijk, P.V.; Roeloffzen, C.G.H.; Bourderionnet, J.; Tomkos, I.; Syvridis, D. Free Space Intra-Datacenter Interconnects Based on 2D Optical Beam Steering Enabled by Photonic Integrated Circuits. Photonics 2018, 5, 21.

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