PetascalePhotonic Chip Connectivity for Energy Efficient AI Computing Slides

Abstract: High-performance data centers are increasingly bottlenecked by the energy and communications costs of interconnecting numerous compute and memory resources. Current systems face a gap of nearly two orders of magnitude between on-chip, intra-socket, communication capacities, and the capacities of links transporting data over longer distances. The per bit energy cost of data movement dominates that of data processing, as does density, throughput, and latency. Integrated silicon photonics offer the opportunity of optical connectivity that delivers high off-chip communication bandwidth densities with low power consumption. To realize these benefits deeply embedded packaging of photonics with the compute and memory is critical. This talk will cover these multi-chip packaging challenges as well as approaches for leveraging dense wavelength-division multiplexing photonic IO that can scale to realize Petabit/s chip escape bandwidths with sub-picojoule/bit energy consumption. Bio: Keren Bergman is the Charles Batchelor Professor of Electrical Engineering at Columbia University where she also serves as the Faculty Director of the Columbia Nano Initiative. Bergman received the B.S. from Bucknell University in 1988, and the M.S. in 1991 and Ph.D. in 1994 from M.I.T. all in Electrical Engineering. At Columbia, Bergman leads the Lightwave Research Laboratory encompassing multiple cross-disciplinary programs at the intersection of computing and photonics. Since 2023 Bergman is the Director of the Center for Ubiquitous Connectivity (CUbiC) a 5-year multi-university center funded by DARPA and the Semiconductor Research Corporation (SRC) under the Joint University Microelectronics Program 2.0 (JUMP 2.0). Bergman serves on the Leadership Council of the American Institute of Manufacturing (AIM) Photonics leading projects that support the institute’s silicon photonics manufacturing capabilities and Datacom applications. She is the recipient of the IEEE Photonics Engineering Award and is a Fellow of Optica and IEEE.