The Optical Networking and Communication
Conference & Exhibition

San Diego Convention Center,
San Diego, California, USA

Panel II: Transport on a Plug

Wednesday, 11 March
13:30 - 15:00
Expo Theater I

Moderator: Joy Jiang, Technical Program Manager, Google Fiber, USA

Panel Description:

IP over DWDM (IPoDWDM) is not a new topic and the idea has been in debate for many years. By eliminating part or all of the traditional optical transport layer functions, e.g., SONET/SDH, OTN, etc., significant savings in CAPEX and OPEX can be achieved, in addition to power and space reductions. With DCI-edge type of metro applications, e.g., DCI, 5G xhaul, remote-PHY, etc., continuing to grow exponentially, industry is moving towards adoption of IPoDWDM to connect network equipment, e.g., switches, routers, radio antennas, remote-PHY devices, etc. at different tiers of the network. On the other hand, traditional long-haul, transcontinental, and subsea connections are still employing conventional optical transport systems. The other driving momentum for IPoDWDM types of systems is the deep penetration of WDM technology into access network as ISPs start to become more confident in handling these systems directly. Above all, IPoDWDM is becoming a buzzword in both the telecom and the datacom industry.  

This Network Operator Summit session will assemble speakers from leading edge operators around the world that are exploring and deploying IPoDWDM and some systems alongside component vendors that are developing IPoDWDM technology. Throughout the session, speakers will articulate IPoDWDM use cases and technology updates.  


Frank Chang, Chief Engineer, Source Photonics
Direction and Applications of High-speed Pluggable Transceivers for Networking Edge

The trend of IPoDWDM solutions over the last few years seems to have taken an exponential growth with the advent and adoption of 100G pluggable transceivers. The inherent reason is the demand for low latency and quality of service associated with disaggregated data center model, which transports cloud traffic closer to the edge of the network. Similarly with the coming of 5G, flexible Cloud RAN (C-RAN) architecture split various transport segments to create fronthaul, mid-haul and backhaul connectivity, which will be quite likely the next biggest opportunity for demanding more high-speed pluggable modules. During this transition from 100G to 400G, the cost of the 400G coherent modules is just too expensive, this talk will review various viable and practical alternatives further down the road.

Jörg-Peter Elbers, SVP Advanced Technology, Standards & IPR, ADVA Optical Networking, Germany
Transport On a Plug – Hot or Not?

Advances in photonic integration and CMOS technology facilitate the realization of sophisticated digital signal processing and protocol functions on pluggable optical modules. This talk will illustrate challenges and opportunities of this approach and discuss where transport on a plug is hot … and where it is not.

Mark Filer, Principal Engineer, Optical Networking, Microsoft, USA
Lessons Learned: IPoDWDM Deployments Over Open Line Systems for Cloud-scale Optical Networks

We review Microsoft’s transition from vendor-managed, proprietary optical networks to an IPoDWDM approach for metro/DCI, long-haul, and even subsea applications. Open Line System (OLS) technology as a prerequisite of the IPoDWDM approach will be discussed, as will the criticality of standard data models and APIs for SDN control of layer 0 to layer 3 devices. In particular, we’ll examine IPoDWDM as a key enabler, and distinctive feature, of Microsoft’s regional architecture.

Tad Hofmeister, Optical Network Architect, Google, USA
IPoDWDM; Not Limited to Plugs

Advances in CMOS and integrated photonic technologies have enabled the availability of digital coherent DWDM transceivers in client plug form-factors for line-side DWDM directly on routers. However, network operators can also reap the advantages of eliminating the OTN layer in their networks for IPoDWDM even when the line-side DWDM function is not housed directly on the router. This talk will summarize how Google leverages both approaches to optimize total network costs and performance throughout its backbone networks.

Radha Nagarajan, Chief Technology Officer, Interconnects, Inphi, USA
400G ZR, Coherent Transport Plug for IPoDWDM Applications in Switches and Routers

This panel will discuss the performance of 16 QAM coherent, 400G, pluggable QSFP-DD module for ZR applications and beyond. This module is based on our fully integrated silicon photonics engine and latest generation 7nm CMOS, DSP technology.


Frank Chang, Chief Engineer, Source Photonics

Frank Chang is Chief Engineer for transceiver design at Source Photonics in West Hills of Los Angeles area. Previously he held various project and management positions with Inphi, Vitesse, Cisco/Pirelli, JDS Uniphase etc for working on the design, development, and commercialization of fiber optics components. He specializes in PAM4 related optics design and leads optical system engineering efforts for physical layer IC platform and transceiver solutions. He has over 100 peer-reviewed journal/conference articles and 5 book chapters. He obtained his Ph.D in Optoelectronics from the Ecole Polytechnique, University of Montreal, Canada. His recent new book entitled “Datacenter Connectivity Technologies: Principles and Practice”  (August 2018) has been highly reviewed and featured by OSA’s “Optics & Photonics News” magazine in February 2019 issue during OFC 2019 as well as in “Optical Connections Magazine” issue 14, Q3 2018 during ECOC 2018.

Jörg-Peter Elbers, SVP Advanced Technology, Standards & IPR, ADVA Optical Networking, Germany

Jörg-Peter Elbers is Senior Vice President Advanced Technology, Standards & IPR at ADVA and has more than 20 years of experience in the optical networking industry. At ADVA, he is responsible for technology strategy, applied research, standardization and intellectual property management. Before joining ADVA, Jörg had leadership roles at Ericsson, Marconi and Siemens. He holds a Dipl-Ing. and Dr.-Ing. degree in electrical engineering from Technical University Dortmund, Germany.

Mark Filer, Principal Engineer, Optical Networking, Microsoft, USA

Mark is currently Principal Engineer in Optical Networking at Microsoft where he is focused on metro DCI, long-haul, and subsea optical solutions and next-generation data center architectures. Prior to that, he spent 14 years in optical R&D at ADVA Optical Networking in Atlanta, GA. He has published research in the areas of cloud-scale open line systems, long-haul transmission, ROADM network architectures, and system impairments. He holds B.Sc. and M.Sc. degrees in electrical engineering from the Georgia Institute of Technology in Atlanta, GA.

Tad Hofmeister, Optical Network Architect, Google, USA

Tad Hofmeister is a Network Architect at Google with a focus on scalable, cost-effective DWDM technologies and software management innovations. He manages the Optical Architecture and Transport Engineering teams in Google’s Cloud Networking group and is Vice President and member of the board of the OIF. Prior to working at Google, Tad was an architect, system engineer, and hardware designer for several optical transport and packet processing companies including: Ciena, Matisse Networks, OpVista, and Applied Signal Technology. Dr. Hofmeister earned MS and Ph.D. degrees in EE from Stanford University and BS degrees from Columbia University and Bates College.

Joy Jiang, Technical Program Manager, Google Fiber, USA

Dr. Joy Jiang is the Technical Program Manager at Google Fiber. She manages various innovative projects such as Super-PON, the TWDM-PON network that was developed by Google Fiber. Dr. Jiang holds received a PhD in mechanical engineering from UC Berkeley in 2003.

Radha Nagarajan, Chief Technology Officer, Interconnects, Inphi, USA

Radha Nagarajan is Inphi’s Chief Technology Officer, Interconnects. Prior to Inphi, he was with Infinera, as a Fellow, working on the development of large-scale photonic integrated circuits.Dr. Nagarajan is a Fellow of the IEEE, OSA and IET. In 2006, he shared the IEEE/LEOS Aron Kressel Award for his work on commercializing large-scale photonic integrated circuits. He has been awarded 171 US patents, and authored/coauthored over 185 technical papers and five book chapters. He received his Ph.D. from UC, Santa Barbara, in Electrical Engineering.

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