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This breakthrough in programmable photonic circuits addresses a critical bottleneck for light-based computing by enabling dynamic control over signal propagation speeds. By integrating delay and buffering functions directly onto a single chip, this technology could significantly reduce energy consumption and complexity within future AI data centers where optical interconnects are essential.

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New programmable photonic chip can control how fast light moves

ScienceDailyJuly 22, 20267 min read

Scientists have created a programmable optical chip that can slow light on demand, giving engineers far greater control over how optical signals propagate through a circuit. The technology could provide the delays, synchronization, and buffering functions needed to make light-based computing more practical. A single chip could eventually perform several tasks that currently require separate devices, potentially reducing energy use, cost, and complexity in AI servers and data centers.

Researchers at Seoul National University and the University of Seoul have developed a programmable photonic integrated circuit that can slow light whenever needed. The team was led by Professors Namkyoo Park and Sunkyu Yu of the Department of Electrical and Computer Engineering at Seoul National University, working with Professor Xianji Piao of the School of Electrical and Computer Engineering at the University of Seoul. The rapid growth of generative AI and large scale AI models has sharply increased the amount of computing power required by data centers and servers. Conventional electronic semiconductors are struggling to keep pace because they consume large amounts of energy and face limits in how quickly they can transmit data. These challenges have intensified interest in optical computing, which uses light rather than electrical signals to process information.…

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