Cookies Use on AFL Website We use cookies to give you the best online experience. By using our website you agree to our use of cookies in accordance with our privacy policy. Agree
Home / AFL Blog / May 2018 / The Path to 100G Single Lambda in the Data Center - Part 6
Blog posts

The Path to 100G Single Lambda in the Data Center - Part 6

Maury Wood, Test & Inspection

There have been a significant number of key photonic component and technology announcements since the last installment of this blog series. These announcements are clear evidence of the growing industry ecosystem support for 100Gbps single lambda (100GSL), enabling 200G and 400G Ethernet links in enterprise and hyperscale data center optical networks. Most critically, 100GSL allows duplex 400G (IEEE 802.3bs) using parallel optics on a single MPO-12 multifiber cable assembly (for example, the 500 meter reach 400GBASE-DR4 / PSM4 and the 2 km reach 400GBASE-FR4). At least three 400G ready Multi-Source Agreement (MSA) pluggable module definitions will leverage 100GSL technology: QSFP56-DD, OSFP and CFP8. The COBO (Consortium for On-Board Optics) MSA is also likely to adopt 100GSL for their proposed 400G and 800G frontplane, midplane and backplane solutions. Additionally, the 100G Lambda MSA Group was established in September 2017, and released their first specifications in January of this year. Things are certainly moving fast!

These recent announcements can be organized into three categories: electrical interface standards and switch ASICs; PAM4 DSPs; and PAM4 electro-optic (EO) modulation components.

Electrical Interface Standards and Switch ASICs

On January 16, 2018, the Optical Internetworking Forum (OIF) announced the publication of the Common Electrical I/O CEI 4.0, which pertains to 56 Gbps NRZ, Ensemble NRZ and PAM4 SerDes (Serializer/Deserializer) interfaces such as those between switch ASIC chips and pluggable optical modules. This industry standard includes ultra-short reach, extra short reach, very short reach, medium reach and long reach electrical specifications to span die-to-die to connector-over-backplane applications. The OIF CEI 4.0 specs will be used in four lane CDAUI-4 / GAUI-4 for 200G and eight lane CDAUI-8 / GAUI-8 for 400G systems (such as those using OSFP and QSFP-DD transceiver modules).

Broadcom, long the dominant supplier of merchant (open market) Ethernet switch chips, announced the 16nm Tomahawk3 switch ASIC in December 2017 with 256 count PAM4 SerDes channels at 56G, yielding 128 100GbE (or 32 ports of 400G Ethernet) for an aggregate bandwidth of 1.2 Tbps per 16nm process technology chip. Xilinx offers 56G PAM4 SerDes in their 16nm FinFET+ Virtex UltraScale+ FPGAs, announced in May of 2017, and Altera/Intel announced 56 Gbps PAM4 SerDes for their Stratix 10 FPGAs in the same month in 2016. FPGAs are used by some Ethernet switch makers, who prize their rapid reconfigurability.

There is wide industry analyst speculation that the next generation of 10nm switch ASICs and FPGA chips will offer direct optical I/O, most likely using interposer packaging technology and possibly silicon photonics (SiPh).

PAM4 Digital Signal Processors

According to the publication Semiconductor Engineering, the average design cost of a 16nm biCMOS or FD-SOI FinFET chip is roughly $80M from start to finish. With this in mind, it is quite remarkable to see the financial commitment being made by several companies in the domain of PAM4 100GSL / coherent DSP chips at the 16nm semiconductor process technology node.

Here is a sampling of the feverish activity in this area:

  • MultiPhy announced the FlexPhy MPF3101-SRW in February. This DSP includes extremely high speed mixed-signal ADC and DAC functions, as well as support for advanced FEC schemes such as MLC-BCH and staircase coding.
  • In March, Infinera announced the ICE5 – Infinite Capacity Engine – comprising both a photonic IC and their FlexCoherent DSP with capacity to a remarkable 600G per lambda.
  • In March, NeoPhotonics announced its ClearLight CFP Digital Coherent Optics (DCO) transceiver based on a 16nm CMOS DSP.
  • Inphi announced the Vega 16nm PAM4 Retimer and Gearbox family, with embedded InphiNity™ DSP engine in August 2017. The Inphi M200 LightSpeed-III 16nm coherent DSP was announced in September 2017; this device includes a FIPS compliant AES256 encryption engine.
  • Ciena announced their latest WaveLogic3 Ai coherent DSP in March of this year. It includes Tx and Rx engines as well as a soft FEC embedded engine.
  • MACOM announced the 16nm FinFET MATP-40050 PRISM4 in March in conjunction with ColorChip. This device includes a network interface with four bidirectional lanes of 53 GBaud PAM4 (106 Gbps), integrated linear laser drivers, as well as a DSP-based FEC and equalizer to support SMF links reaching 2 km.
  • In March, Nokia announced the PSE-3 Photonic Service Engine coherent DSP, which utilizes an advance in spectral efficiency called probabilistic constellation shaping and that in combination with 64-QAM modulation, can also support 600G per lambda.
  • NTT Electronics announced their ExaSPEED 200 16nm FinFET 64 GBaud coherent DSP for DWDM application in March. This device also supports up to 600G per lambda using 64-QAM, and was developed in collaboration with Broadcom.
  • In January, MaxLinear announced the 16nm Telluride MxL935XX DSP SoC family with integrated electro-absorption externally modulated laser (EA-EML) driver for 400G interconnects, with a claimed power dissipation of 6.7W to meet QSFP-DD, OSFP and COBO requirements. Variants of this family are also suitable for use with silicon photonics. All members include transmit digital pre-distortion (DPD) and comprehensive receive equalization (CTLE, AGC, FFE and DFE).

PAM4 EO Modulation Components

There has been a corresponding flood of announcement in PAM4 electro-optic modulation components that support 100GSL.

  • In September of last year, MACOM announced the MATA-03819/03919 quad 53 GBaud TIA family, the PT-28E differential-output reference receiver module, and MATA-03820 four channel 100G linear TIAs for 53G Baud PAM4. MACOM also announced the MAOP-L561PP photonic integrated circuit with a high bandwidth (56G) Mach-Zehnder modulator including a four lambda CWDM multiplexer, plus a 1310 nm CW DFB laser. An integrated tap detector is provided for fiber alignment and closed loop control.
  • In March, Oclaro announced 64G Baud micro-intradyne coherent receiver (micro-ICR), integrated coherent transmitter (ICT), high bandwidth co-package driver modulator (HB-CDM), and high bandwidth lithium niobate polarization-multiplexed quadrature Mach-Zehnder (PM-QMZ) modulator, and 100 kHz micro-integrated tunable laser assembly (micro-ITLA), compliant to OIF CEI standards. While these components are intended for coherent transceiver solutions more typical of long haul applications, they underscore the technology evolution underway for 400G transmission. Also in March, Oclaro announced availability of its 100G PAM4 EA-DFB EMLs.
  • NeoPhotonics announced a family of 53GBaud linear optical components in March. This family includes an open drain driver (ODD) for Externally-Modulated Lasers (EMLs), a quad Mach-Zehnder module (MZM) driver, a CWDM4 EML, PIN photodetectors, and a Transimpedance Amplifier (TIA).
  • MaxLinear in March announced the MxL9154 PAM4 400G quad channel linear TIA, which achieve 3% linearity up to overload conditions, and a bandwidth of more than 25 GHz, making them ideal for 100GSL transceiver applications. MaxLinear claims the die size of this device enable it to meet the quad-ROSA size restrictions of both QSFP-DD and OSFP module form factors.

These impressive 100GSL technology and component announcements signify the development of a very healthy industry ecosystem that will deliver a variety of 400G short reach transceiver modules in 2019. It is remarkable to consider that 2017 was hailed as the year of 100G deployment in hyperscale data centers, and that just three to four years later, production quantity of products offering a quadruple speed upgrade will be available to support the voracious and insatiable worldwide demand for broadband information access.

Posted: 5/10/2018 by AFL | with 0 comment(s)
Filed under: Data Center, Test and Inspection
Comments
Blog post currently doesn't have any comments.
Leave comment



 Security code

Recent Posts

Intrinsic and Extrinsic Attenuation in Fiber Optic Cables

12/7/2021 3:44:30 PM | with 0 comments
Attenuation, or the loss of light or signal, is nearly unavoidable when installing your fiber network. This blog will explore its two forms: intrinsic and extrinsic attenuation.

Product FAQs: Collapsible Ribbon

11/9/2021 4:08:57 PM | with 0 comments
As collapsible ribbon grows in popularity, AFL continues to receive inquiries concerning this new trend. To address some of the frequently asked questions, we reached out to our splicing experts to get the answers.


AFL’s SkyWrap® Cable Spans Greenland’s Terrain

11/5/2021 10:01:03 AM | with 0 comments
This blog showcases AFL's SkyWrap® cable installation for a TELE-POST project in Greenland.


Optical Fiber is the Key to Future-Proof Networks

10/26/2021 4:06:15 PM | with 0 comments
AFL's Seán Adam explains how optical fiber is key to ensuring "future-proof networks," a crucial element in maintaining this growing rate of connectivity.

Product Spotlight: NodeFLEX® Bendable Cable Assembly

10/26/2021 11:45:52 AM | with 0 comments
AFL designed the NodeFLEX® Bendable Cable Assembly to help multi-system operators (MSOs) simplify the installation of aerial, underground and pedestal mount applications.

Blog Tags

& 100G 12R 12S 2014 2015 2016 21s 22S 31S 41S 5G 62S 70R 70S 802.11ax 90R Absorption Access Networks accessibility accessories AccessWrap ADSS Aerial Aeros AFL AFL. Air Blown Fiber AlumaCore Aluminum and APEX APM-101 APM-102 APTA ASCEND ASIS Associates attenuation awards bandwidth Best Practices BICSI Bishop black Blog bluetooth Broadband BTR bus Cable cable deployment Cables Cable-Tec Cabling Careers Case Case Studies Catalogs Cell Tower Demarcation center Certification CGM Plus Rack Panel CI&M Innovators Award Cladding clean cleaner Cleaning Cleaning Supplies Cleaver cloud CO2 Lasers Coating collaboration collapsible Community Community Outreach compression Compression Accessories Computing Conductor Connect Connections Connectivity connector Connectors Co-ops copper Core Core-alignment Coronavirus Corporate Covid-19 C-RAN CT-30 CT50 CTIA customer experience CWDM dampers DAS data Data Center Data Centers Dead Ends demarcation Demonstration density Diamond Distribution Enclosure Donda DT Duel Dura-Line DWDM eABF Edge electric Enclosure end-to-end solutions Energy Engineer Enterprise Equipment ESB estimation expandability Expo Exterior Distribution Cabinet Extrinsic Facebook Fall Fall 2013 FAST SC FASTConnect FC Features Fiber Fiber Cleaver Fiber Connector Inspection Fiber Distribution fiber inspection Fiber Laser fiber management Fiber Optic Fiber Optic Cable Fiber Optic Intrusion Detection System Fiber Optic Training Fiber OpticTraining Fiber Prep Fiber Security Fiber Shaping Fiber Splicing fibre fibre optic cable field installable Field Splicer flexibility flexscan Flex-Span Flickr FlowScout FOCIS FOCIS Duel FOCIS Flex FOCIS Lightning FOCIS WiFi2 French FSM-100 FTTh FTTx Fujikura FuseConnect Fusion Fusion Splicer Fusion Splicers Fusion Splicing Gas generations Glass Processing global Google Governor Nikki Haley Grand Canyon Greenville Grounding Hardware high high-density High-Wire Walk HiTemp Hyperscale IDEAA IEEE infrastructure innovation inspect Inspection Instagram Install Installation Installing Instructions Integrated Solution International Sales Meeting Internet Interns Intrinsic IoT JMA Kit Laser Last Mile LAZERMaster LC Light Brigade LightLink LightWave LinkedIn live line LL-550 LL-550 & LL-580 enclosures LL580 LL-580 LMHD Loss LZM-100 M210 M310 Macrobend Maintenance mechanical Metro Ethernet Metro-E MFIS Microbend MicroCore Mining mode Month of Service mount MPO MSOs Multi-Fiber Identification System multimode Network Networks new New Year NFPA Nik Wallenda Noyes NY OCS OEM of Oil One-Click OPGW Optic Optical Optical Connectivity Optical Sensing Optical Splicing optics OSP OSP MicroCore: LM200 & LMHD Series OTDR Outside Plant panel panels Paper PCS-100 Stripper Perimeter Security System PES Photonics Photonics West PhotonicsWest platform PM Splicing polarity Poli-Mod power Power Systems PREVAIL Procedures product Product Registration Products Provider providers rack Rail Railway Recoater Recruiting resource center Resources Reviews ribbon Rogue Rural Utilities Rusty Williams SB01 SC SCADA Scattering SCTE SCTE Cable-Tec SDN Selection Sensing service Services Sidewinder Rapid Cable Deployment System Silver Level Award single single circuit outage Single Lambda Single-mode SkyWrap Small-Cell Smart City Smart-Grid Smartphone Snapshot Social Software Defined Networking Solutions Spanish Specialty Specialty Splicer Spider Web Ribbon SpiderWeb SPIE Splice Enclosure Splicer Splicers Splicing ST Stockbridge Dampers Stranded Stainless Steel Cable Stream Streetcar Structured Cabling Study substation SuperMobility Support SWAGE Swaging swan SWAT SWFT System systems T&D T&I: technology Terminal termination Termination Instructions Test Test &Inspection Test and Inspection Testing Things Titan Tools trade show Trade Shows traffic Training Transit transition transmission Transportation trends TS100 Tube Tutorials Twitter Ultra HD Upstate Alliance utilities Utility ventilator VFI V-Groove vibration Video Videos Vodafone WDM WDM900 We Connect Webinar Website White White Paper White Papers White-Paper Wi-Fi Winter Wireless Women workflow Wrapping Wrapping Tube Cable WTC/SWR