960 Gb/s optical backplane using embedded polymer waveguides and demonstration in a 12G SAS storage array

Schmidtke, Katharine; Flens, Frank; Worrall, Alex; Pitwon, Richard; Betschon, Felix; Lamprecht, Tobias; Kraehenbuehl, R.

doi:10.1109/oic.2013.6552908

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…This I/O interconnect challenge can be met by the use of a new generation of miniature optical transceivers [1][2][3]. Samtec's Firefly on-board optical engine was designed with this application in mind.…”

Section: Discussionmentioning

confidence: 99%

170Gb/s FPGA to FPGA optical interconnects using a x12 14Gb/s onboard optics

Viitas¹,

Verdiell

Burt

et al. 2015

2015 IEEE Optical Interconnects Conference (OI)

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Section: Discussionmentioning

confidence: 99%

170Gb/s FPGA to FPGA optical interconnects using a x12 14Gb/s onboard optics

Viitas¹,

Verdiell

Burt

et al. 2015

2015 IEEE Optical Interconnects Conference (OI)

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“…LightningValley is a partially optically interconnected data storage system. It was developed based on a modified 4U24 OneStor enclosure from Seagate Technology, in which 12 Gb/s Serial Attached SCSI (SAS) traffic was conveyed optically between the SAS protocol switches on two internal controller cards along 24 PCB embedded polymer optical waveguide channels, thereby showing, for the first time, how in-system optical channels could be successfully deployed within a 12G SAS architecture [4].…”

Section: Introductionmentioning

confidence: 99%

Evolution of System Embedded Optical Interconnect in Sub-Top-of-Rack Data Center Systems

et al. 2022

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In this paper we review key technological milestones in system embedded optical interconnects in data centers that have been achieved between 2014 and 2020 on major European Union research and development projects. This includes the development of proprietary optically enabled data storage and switch systems and optically enabled data storage and compute subsystems. We report on four optically enabled data center system demonstrators: LightningValley, ThunderValley2, Pegasus and Aurora, which include advanced optical circuits based on polymer waveguides and fibers and proprietary electro-optical connectors. We also report on optically enabled subsystems including Ethernet-connected hard disk drives and microservers. Both are designed in the same pluggable carrier form factor and with embedded optical transceiver and connector interfaces, thus allowing, for the first time, both compute and storage nodes to be optically interchangeable and directly interconnectable over long distances. Finally, we present the Nexus platform, which allows different optically enabled data center test systems and subsystems to be interconnected and comparatively characterized within a data center test environment.

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“…It is difficult to install a large storage device close to a host controller because of physical space and heat constrains in a server enclosure, and the interconnection length cannot be reduced. Accordingly, high-speed low-loss power-efficient optical interconnection is expected to be applied for DAS connection [3] and [4].…”

Section: Introductionmentioning

confidence: 99%

“…SAS supports optical interconnection for external enclosure connection using an I/O expander, in which the OOB is replaced with optical friendly binary signaling. The demonstration of an optically connected SAS storage device was reported in [4]. However, optical interconnection is not taken into account in SATA and SAS for internal enclosure connection.…”

Section: Introductionmentioning

confidence: 99%

12.5 Gb/s Optical Driver and Receiver ICs With Double-Threshold AGC for SATA Out-of-Band Transmission

Uemura

Kurita

Furuyama

2016

IEEE J. Solid-State Circuits

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In order to realize optical interconnection for high-speed low-latency direct-attached storage in a data center, we developed double-threshold automatic gain control (AGC) that enables reliable optical out-of-band (OOB) transmission in de facto standard storage interfaces such as Serial ATA (SATA) and Serial Attached SCSI (SAS). OOB is quasiternary signaling composed of differential burst signals separated by idle conditions and is poorly compatible with general optical interconnections. It has excessively large gain and substantially affects noise-susceptible idle conditions. 12.5 Gb/s driver and receiver ICs with the doublethreshold AGC were fabricated in TSMC 90 nm CMOS process. The double-threshold AGC enabled reliable optical OOB transmission by noise rejection in the idle conditions and by excess gain reduction for suppression of ringing and decay after the burst signals. As a result, optically connected SATA 6 Gb/s transmission was realized for the first time.Index Terms-Direct attached storage, double threshold automatic gain control, optical driver, optical interconnection, optical receiver, out-of-band signal, serial ATA, serial attached SCSI.

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960 Gb/s optical backplane using embedded polymer waveguides and demonstration in a 12G SAS storage array

Cited by 4 publications

References 2 publications

170Gb/s FPGA to FPGA optical interconnects using a x12 14Gb/s onboard optics

170Gb/s FPGA to FPGA optical interconnects using a x12 14Gb/s onboard optics

Evolution of System Embedded Optical Interconnect in Sub-Top-of-Rack Data Center Systems

12.5 Gb/s Optical Driver and Receiver ICs With Double-Threshold AGC for SATA Out-of-Band Transmission

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