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arXiv · 2508.06079

Panel-Scale Reconfigurable Photonic Interconnects for Scalable AI Computation

Tzu-Chien Hsueh·Bill Lin·Zijun Chen·Yeshaiahu Fainman
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Abstract

Panel-scale reconfigurable photonic interconnects on a glass substrate up to 500-mm x 500-mm or larger are envisioned by proposing a novel photonic switch fabric that enables all directional panel-edge-to-panel-edge reach without the need for active repeaters while offering high communication bandwidth, planar-direction reconfigurability, low energy consumption, and compelling data bandwidth density for heterogeneous integration of an in-package AI computing system on a single glass-substrate photonic interposer exceeding thousands of centimeters square. The proposed approach focuses on reconfigurable photonic interconnects, which are integration-compatible with commercial processor chiplets and 3D high-bandwidth memory (HBM) stacks on a large-area glass substrate, to create a novel panel-scale heterogeneously integrated interposer or package enabling low-energy and high-capacity wavelength-division-multiplexing (WDM) optical data links using advanced high-speed optical modulators, broadband photodetectors, novel optical crossbar switches with multi-layer waveguides, and in-package frequency comb sources.

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Tzu-Chien Hsueh, Bill Lin, Zijun Chen, Yeshaiahu Fainman. 2025-08-08. Panel-Scale Reconfigurable Photonic Interconnects for Scalable AI Computation. https://arxiv.org/abs/2508.06079

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