Scalable architecture for sub-pJ/b multi-Tbps comb-driven DWDM silicon photonic transceiver

Yuyang Wang; Asher Novick; Robert Parsons; Songli Wang; Kaylx Jang; Aneek James; Maarten Hattink; Vignesh Gopal; Anthony Rizzo; Chia-Pin Chiu; Kaveh Hosseini; Tim Tri Hoang; Keren Bergman

doi:10.1117/12.2649506

15 March 2023 Scalable architecture for sub-pJ/b multi-Tbps comb-driven DWDM silicon photonic transceiver

Yuyang Wang, Asher Novick, Robert Parsons, Songli Wang, Kaylx Jang, Aneek James, Maarten Hattink, Vignesh Gopal, Anthony Rizzo, Chia-Pin Chiu, Kaveh Hosseini, Tim Tri Hoang, Keren Bergman

Author Affiliations +

Proceedings Volume 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII; 124291F (2023) https://doi.org/10.1117/12.2649506
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

The explosive growth of data-centric artificial intelligence applications calls for the next generation of optical interconnects for future hyperscale data centers and high-performance computing (HPC) systems. To unleash the full potential of dense wavelength-division multiplexing, we present the design and exploration of a novel transceiver architecture based on silicon photonic micro-resonators featuring a broadband Kerr frequency comb source and fabrication-robust (de-)interleaving structures. In contrast to the traditional single-bus architecture, our architecture de-interleaves the comb onto multiple buses before traversing separate banks of cascaded resonant modulators/filters, effectively doubling the channel spacing with each stage of de-interleaving. With a closed-form free spectral range (FSR) engineering technique guiding the micro-resonator design, the architecture is scalable toward hundreds of parallel channels—spanning much wider than the resonator FSRs—with minimal crosstalk penalty and thermal tuning overhead. This unique architecture, designed with co-packageability in mind, thus enables a multi-Tbps aggregated data rate with moderate per-channel data rates, paving the way for sub-pJ/b ultra-high-bandwidth chip-to-chip connectivity in future data centers and HPC systems.

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Yuyang Wang, Asher Novick, Robert Parsons, Songli Wang, Kaylx Jang, Aneek James, Maarten Hattink, Vignesh Gopal, Anthony Rizzo, Chia-Pin Chiu, Kaveh Hosseini, Tim Tri Hoang, and Keren Bergman "Scalable architecture for sub-pJ/b multi-Tbps comb-driven DWDM silicon photonic transceiver", Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124291F (15 March 2023); https://doi.org/10.1117/12.2649506

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