Home / AFL Blog / May 2017 / The Path to 100G Single Lambda in the Data Center - Part 2
Blog posts

The Path to 100G Single Lambda in the Data Center - Part 2

Maury Wood, AFL Test & Inspection Product Line Manager

Part 2 (Part 1 - Part 3)

Welcome to part two of this blog series on the technical and commercial dynamics that will lead the semiconductor and electro-optical components industries to 100G single lambda system over the next several years.

Obviously, modern networking infrastructure equipment has broad scope.  For the purposes of this analysis journey, we'll constrain ourselves to the physical layer technology that begins and ends with a layer 2/3 Ethernet switch.

While not definitional, in end-to-end 25G single lambda signal chains, the electrical SerDes rate in the chip-to-module interface between the switch ASIC and the pluggable transceiver also runs at 25 Gbps (or 28 Gbps to account for 64B/66B encoding and FEC overhead when used).

So the first challenge to 25G single lambda is a 28 Gbps electrical SerDes.  This is by no means a trivial accomplishment.  FPGA suppliers Altera/Intel and Xilinx were first able to offer this operating frequency in their 28 nm Stratix V and Virtex 7 product platforms in 2011.  Switch ASIC leader Broadcom was able to offer this operating frequency in their 28 nm Tomahawk ASIC (with 7B transistors) in September 2014.  Based on FPGA roadmaps and switch ASIC roadmaps, it is likely that 30-33 Gbps NRZ (56 Gbps PAM-4) SerDes will become available in the 16/14 nm FinFET+ generation which sees production this year (2017).  The assumption here is "NRZ" signaling (1 bit per symbol) will be used in the 56 Gbps generation, then move to 56 GBaud PAM-4 for the 112G single lambda generation.  Aquantia, Credo Semiconductor, Broadcom and others have made technology and product announcements on 56 Gbps discrete PHY solutions recently.  We'll come back to this topic, but drop a pin in this part of the signal chain, because it is instructive to point out that the OIF CEI-56G-VSR and CEI-112G-VSR CAUI chip-to-module interfaces only reach through 10 cm of copper, and use heavy doses of TX pre-emphasis, RX equalization and even Reed Solomon Forward Error Correction.  This illustrates the relative ease with which photons travel through pure silica glass compared to the tough slog faced by electrons in copper, even with exotic PCB materials.


25g-eye-diagram.png
25G Eye Diagram


Okay, we'll start next time with a quick discussion about information theory – it’ll be fun!


Posted: 5/12/2017 by Sami Melton | with 0 comment(s)
Filed under: AFL, Test &Inspection
Comments
Blog post currently doesn't have any comments.
Leave comment



 Security code

Recent Posts

Utility FTTx Development

8/15/2018 1:26:57 PM | with 0 comments
This new AFL white paper, “Leveraging ADSS Cable Technology in Utility FTTx Networks,” details the advantages of using all-dielectric self-supporting (ADSS) cable technology in FTTx solutions. 

Streetcar Project Snapshot

8/10/2018 11:44:47 AM | with 0 comments
AFL specializes in many areas and tries to meet every customer’s needs. The AFL Assemblies and Components’ extensive product portfolio has improved streetcar systems in big city locations, such as Atlanta, Detroit and Cincinnati.

Oil and Gas: All You Need to Know

8/8/2018 12:29:01 PM | with 0 comments
As an end-to-end solutions provider, AFL prides itself on always being there for its customers, especially when it comes to oil and gas. AFL has made many helpful guides, videos, white papers and more just for you.

Data Centers: All You Need to Know

8/6/2018 8:25:28 AM | with 0 comments
Explore the new AFL resource center and discover all that it has to offer!  AFL has streamlined all data center content into one unified area on this new hub.  This Data Center Stream is just one of many new components to the resource center. 

Structured Cabling: All You Need to Know

7/31/2018 7:47:07 AM | with 0 comments
Explore the new AFL resource center and discover all that it has to offer!  AFL has streamlined all structured cabling content into one unified area on this new hub.  This Structured Cabling Stream is just one of many new components to the resource center. 
 


Blog Tags

100G 12R 12S 2014 2015 2016 21s 22S 62S 70R 70S Access Networks accessories ADSS Aerial Aeros AFL AFL. Air Blown Fiber AlumaCore Aluminum APM-101 APM-102 APTA ASIS Associates Best Practices BICSI Blog bus Cable Cable-Tec Careers Case Case Studies Catalogs Cell Tower Demarcation Certification Cleaning Cleaning Supplies Cleaver CO2 Lasers Community Outreach compression Compression Accessories Conductor Connections Connectivity Connectors Co-ops Core-alignment Corporate CT-30 CTIA CWDM DAS Data Center Data Centers Dead Ends Demonstration DT Dura-Line DWDM eABF electric Enclosure end-to-end solutions Energy Enterprise Equipment ESB Expo Exterior Distribution Cabinet Facebook Fall Fall 2013 FAST SC FASTConnect FC Features Fiber Fiber Cleaver Fiber Connector Inspection Fiber Distribution Fiber Laser Fiber Optic Fiber Optic Cable Fiber Optic Intrusion Detection System Fiber Optic Training Fiber OpticTraining Fiber Prep Fiber Security Fiber Shaping Fiber Splicing fibre optic cable field installable Field Splicer flexscan Flickr FOCIS FSM-100 FTTh FTTx Fujikura FuseConnect Fusion Fusion Splicer Fusion Splicers Fusion Splicing Gas Glass Processing Google Governor Nikki Haley Grand Canyon Greenville Grounding Hardware High-Wire Walk HiTemp IDEAA IEEE infrastructure Inspection Instagram Install Installation Installing Instructions Integrated Solution International Sales Meeting Interns Kit Laser Last Mile LAZERMaster LC Light Brigade LightLink LightWave LinkedIn live line LL580 LL-580 LMHD LZM-100 M210 M310 Maintenance Metro Ethernet Metro-E MicroCore Mining Month of Service MSOs Network Networks NFPA Nik Wallenda Noyes OCS OEM Oil One-Click OPGW Optic Optical Optical Connectivity Optical Sensing OSP OTDR Outside Plant Paper PCS-100 Stripper Perimeter Security System PES Photonics Photonics West PhotonicsWest PM Splicing Poli-Mod power Procedures Product Registration Products Rail Railway Recoater Recruiting resource center Resources Rogue Rural Utilities Rusty Williams SB01 SC SCADA SCTE SDN Selection Sensing Services single circuit outage Single Lambda SkyWrap Small-Cell Smart-Grid Smartphone Snapshot Social Software Defined Networking Solutions Specialty Splicer SPIE Splice Enclosure Splicer Splicers Splicing ST Stockbridge Dampers Stranded Stainless Steel Cable Stream Streetcar Structured Cabling Study substation SuperMobility Support SWAGE Swaging SWAT SWFT System systems T&D Terminal Termination Instructions Test Test &Inspection Test and Inspection Testing Titan Tools Trade Shows Training Transit transmission Transportation Tutorials Twitter Upstate Alliance Utility VFI V-Groove Video Videos Vodafone WDM WDM900 We Connect Webinar Website White White Paper White Papers White-Paper Wi-Fi Winter Wireless Wrapping Tube Cable

Sign Up for eConnect!