Massively scalable Kerr comb-driven silicon photonic link

Rizzo, Anthony; Novick, Asher; Gopal, Vignesh; Kim, Bok Young; Ji, Xingchen; Daudlin, Stuart; Okawachi, Yoshitomo; Cheng, Qixiang; Lipson, Michal; Gaeta, Alexander L.; Bergman, Keren

doi:10.1038/s41566-023-01244-7

Title: Massively scalable Kerr comb-driven silicon photonic link

Journal Article · 28 June 2023 · Nature Photonics

DOI: https://doi.org/10.1038/s41566-023-01244-7 · OSTI ID:1987749

;

; Gopal, Vignesh;

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; Daudlin, Stuart;

;

; Gaeta, Alexander L.;

Abstract The growth of computing needs for artificial intelligence and machine learning is critically challenging data communications in today’s data-centre systems. Data movement, dominated by energy costs and limited ‘chip-escape’ bandwidth densities, is perhaps the singular factor determining the scalability of future systems. Using light to send information between compute nodes in such systems can dramatically increase the available bandwidth while simultaneously decreasing energy consumption. Through wavelength-division multiplexing with chip-based microresonator Kerr frequency combs, independent information channels can be encoded onto many distinct colours of light in the same optical fibre for massively parallel data transmission with low energy. Although previous high-bandwidth demonstrations have relied on benchtop equipment for filtering and modulating Kerr comb wavelength channels, data-centre interconnects require a compact on-chip form factor for these operations. Here we demonstrate a massively scalable chip-based silicon photonic data link using a Kerr comb source enabled by a new link architecture and experimentally show aggregate single-fibre data transmission of 512 Gb s ⁻¹ across 32 independent wavelength channels. The demonstrated architecture is fundamentally scalable to hundreds of wavelength channels, enabling massively parallel terabit-scale optical interconnects for future green hyperscale data centres.

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Sponsoring Organization:: USDOE

OSTI ID:: 1987749

Journal Information:: Nature Photonics, Journal Name: Nature Photonics Journal Issue: 9 Vol. 17; ISSN 1749-4885

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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