New Chip Slows Light to Solve Computing Bottleneck

A team of researchers, led by professors from Seoul National University and the University of Seoul, has unveiled a programmable photonic circuit designed to control optical signals. This innovation aims to overcome the limitations of conventional electronic semiconductors in meeting the escalating computing power demands of generative AI and large-scale AI models.

The new design allows for the manipulation of light speed, a crucial capability for creating buffers and memory functions in optical computers, which was previously a significant challenge due to light's fixed velocity. The programmable circuit offers greater flexibility over "slow light" phenomena, enabling real-time adjustment of signal delay, bandwidth, and shape.

Simulations suggest the chip could be practically implemented on a silicon nitride platform, even with potential manufacturing variations. This programmable optical chip could consolidate several functions, such as signal synchronization, adjustable delay lines, optical buffers, and frequency conversion, onto a single chip, potentially leading to smaller, less expensive equipment.

This advancement could significantly benefit data centers and AI servers by enhancing information processing efficiency and reducing energy consumption. The researchers plan to expand this technology towards large-scale programmable photonic integrated circuits, laying the groundwork for more adaptable optical signal processing in fields like autonomous driving and quantum technologies.