Wavelength-division-multiplexing based electronic photonic network for high speed computing

Integrated photonics has shown its extraordinary potential in optical computing owing to ultrafast speed, ultrawide bandwidth, and ultralow power consumption. Multiplexing techniques can also scale down the size of the photonics circuits because of the unique properties of bosons. As various passive or active building blocks for optical digital computing have been proposed, it becomes essential to develop architectures suitable for large bit-size computation. In this paper, we propose a novel wavelength-division-multiplexing (WDM) based electronic-photonic network which can implement multiple logic functions for computing. Such network arrays along with electrical circuits are capable of composing large scale electronic-photonic circuits, where the latency of the computing module is further reduced while the footprint of the circuit is also optimized. Design and experimental demonstration of multiple WDM-based fundamental building blocks that compose an optical arithmetic logical unit (ALU) is presented, showing its practicality in future large bit-size, high-speed and energy-efficient optical computing.

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