Panel III: Terabit WDM Channels: Beyond 100GBaud Operation

Tuesday, 08 June 14:30 – 16:00

Moderator: Andrew Schmitt, Cignal AI, USA

Panel Description:

Network operators are deploying the latest 5th generation of coherent optics capable of 800G operation. There are many engineering and commercial challenges involved with building even faster single-carrier systems capable of 1 Terabit operation and beyond. This panel will examine potential DSP, optical, and packaging technologies to make these systems a reality. It will also consider the business case for developing these solutions vs. using lower performance optics as the Shannon limit is reached.

Speakers:

Tom Williams, Acacia (now part of Cisco Systems), USA
Presentation Title: Silicon Photonics for Next-Generation Coherent Interconnects

Martin Zirngibl, II-VI Incorporated, USA
Presentation Title: Enabling Optics & Integration Technologies for Terabit Transmission

Karthikeyan Balasubramanian, Microsoft, USA
Presentation Title: Higher Baud Rate - Benefits and Barriers

Radha Nagarajan, Marvell, USA
Presentation Title: Technology Options to Enable 800Gb/1.6Tb Coherent Modules

Robert Maher, Infinera, USA
Presentation Title: Next Generation Vertically Optimized Digital Coherent MODEMs

 

Biographies:

Andrew Schmitt, Cignal AI, USA

Andrew Schmitt is the founder and directing analyst at Cignal AI, where he leads quantitative and qualitative research on the networking market’s entire supply chain. He is quoted and consulted by industry publications such as Lightwave and LightReading and is a member of the OFC Planning Committee. Mr. Schmitt is invited to speak at events including OFC, ECOC, FOE, and IIR conferences. He also provides consulting services to startups, carriers, vendors, and the investment community on developing business opportunities and market strategy.
 

Karthikeyan Balasubramanian, Microsoft, USA
Presentation Title: Higher Baud Rate - Benefits and Barriers
Abstract: From network operator’s view point, going for higher baud rate has clear economic ( $/bit/sec), power (fewer transponders) and operational benefits (fewer transponder and line system hardware to manage). Spectrum efficiency (which usually translates to total fiber capacity) exhibits a plateauing effect with higher baud rates - actual SE gain % while going to bauds greater than 100 Gbaud remains to be demonstrated. On the other hand, not all traffic demands are born equal. Elephant and mice flows coexists in our network.  We need to consider the additional problem of wavelength planning and routing in mesh networks, where smaller traffic demand can be handled by lower baud rate channels more easily. Also, new network solutions based on open sourced 400GZR/ZR+ are promising to offer highly integrated solutions with reduced cost and power while promising improving performance numbers. Baud rate decisions in these applications are usually a tradeoff between space, power and spectrum efficiency

Karthik Balasubramanian is a Senior Optical Developer at Microsoft. He currently leads the efforts in planning and onboarding next generation long haul transponders and line systems for the Wide Area Network
 

Robert Maher, Infinera, USA
Presenatation Title: Next Generation Vertically Optimized Digital Coherent MODEMs
Abstract: As the symbol rates of commercialized line cards approach 100 GBd, vertical optimization of the coherent MODEM, where the constituent components of the digital coherent transceiver are co-designed, has become a pre-requisite in order to maintain the high levels of signal integrity required to encode, transmit and successfully decode higher order modulation formats. There are three core building blocks that are critical for high performance optics: digital ASIC design, integrated drive electronics with photonic integrated circuits and high-speed packaging. In this talk we will discuss the evolution of these core technologies that are required to realize the next generation of vertically optimized digital coherent MODEMs.

Robert Maher is a Senior Principal Engineer within the Advanced Optical System Group at Infinera. His work focusses on development and integration of next generation digital coherent MODEMs.
 

Radha Nagarajan, Marvell, USA
Presentation Title: Technology Options to Enable 800Gb/1.6Tb Coherent Modules
Abstract: Extending our 400G ZR systems designs, we explore options to implement 800Gb/1.6Tb coherent systems. These systems will push the baud rate limits >100GBaud, and will need new approaches to the design of the DSP and optical components, and employ 2.5/3D high speed co-packaging of optical and electronics to achieve optimum performance.

Dr. Radha Nagarajan is the CTO & SVP, Connectivity Business Unit at Marvell. Dr. Nagarajan brings more than 20 years of experience in the area of high-speed optical interconnects and design, development and commercialization of large-scale photonic integrated circuits. Dr. Nagarajan is a Fellow of the IEEE, OSA and IET (UK). In 2006, he shared the IEEE/LEOS Aron Kressel Award for his work on commercializing large-scale photonic integrated circuits. He has been awarded more than 195 US patents. He received his B.Eng. from the National University of Singapore, M.Eng. from the University of Tokyo, and Ph.D. from the UC, Santa Barbara.

Tom Williams, Acacia (now part of Cisco Systems), USA
Presentation Title: Silicon Photonics for Next-Generation Coherent Interconnects
Abstract: As adoption of 400G and above coherent interfaces are gaining momentum, the industry is looking toward next-generation solutions that operate above 100Gbaud. Higher speeds will push the limits of optical materials and packaging. Adoption of silicon photonics for coherent interfaces has become more widespread, particularly for pluggable applications. This presentation will discuss the benefits and of silicon photonics in these next generation coherent solutions.

Tom is responsible for global marketing and communications activities for Acacia, which is now part of Cisco Systems. Prior to Acacia, Tom spent 14 years at Optium and Finisar Corporations, where he held various management roles, including Director of Product Line Management for high speed (>100G) transmission products. Tom has also held positions at Lucent Technologies and Northrop Grumman Corporation. He has an MS in Electrical Engineering from Johns Hopkins University and BS degrees in Electrical Engineering and Physics from Widener University.
 

Martin Zirngibl, II-VI Incorporated, USA
Presentation Title: Enabling Optics & Integration Technologies for Terabit Transmission

Abstract: The best way to deal with Shannon Limit is to respect it, and focus our engineering attention on other degrees of freedom -- WDM, multi-core fibers, etc. -- and on enhancing component technologies and integration to achieve lower cost and lower power. This includes component-level innovation in integration of modulation and lasing functions, improvement of net SNR, trading off certain parameters to optimize DSP complexity, new ways of packaging amplification in subsystems, and so on. From a market perspective, another way of looking at this is to consider that high-capacity systems may be a better fit for future shorter reach applications like DCI, co-location or client interfaces for transport networks.

Martin Zirngibl is currently Chief Technologist at II-VI Incorporated. Before the II-VI Incorporated acquisition of Finisar, he was the corporate CTO of Finisar, a position he held since 2018. Martin Zirngibl joined Finisar in 2016 as VP, fellow for technology responsible for strategy for coherent products. Prior to joining Finisar, Martin held progressive managerial roles at Nokia, Bell labs, as director of optical networking research and as executive director of device and subsystems research. He joined AT&T Bell laboratories as member of technical staff. Martin Zirngibl holds a PhD in physics for the Swiss Institute of Technology, Lausanne and a diploma in theoretical physics from the same Institute. He was named Bell Labs fellow in 2008. Martin has published over 100 scientific publications, has filed over 50 patents and wrote one book chapter.