Friedel Gerfers, Technische Universität Berlin, Germany
Zuowei Shen, Google, USA
Liang Zhang, Huawei Technologies, Germany
Hyperscale data centers are now deploying 400G optics for the new generation of networks after several years of innovations and development in the enabling technologies. 400G is an inflection point for the industry to switch from NRZ modulation to PAM4. PAM4 modulation poses more challenges to optical components, optical & electrical channels, SerDes and DSP to ensure reliable performance at scale.
The panelists will share their view of the major deployment challenges in 400G optics and beyond. What interoperability issues are found in early deployment (e.g. optical technologies, DSP), What are the challenges in system integration qualification to ensure robust link, What are new in field deployment compared to 100G-NRZ optics, What are the benefits of real time link health diagnostic unit, What could be added to IEEE/MSA to improve interoperability at 800G?