On-chip multi-stage optical delay based on cascaded Brillouin light storage

TL;DR

This paper introduces a novel on-chip multi-stage optical delay system using cascaded Brillouin light storage, enabling flexible and controllable delays within integrated photonic circuits for advanced communication and computing applications.

Contribution

It presents a new delay scheme based on cascaded Brillouin light storage that allows multi-stage, position-independent delays controlled solely by external optical pulses.

Findings

Achieves multi-stage optical delay within a photonic integrated circuit.

Controls delay cascades via external optical control pulses.

Eliminates the need for aligning multiple structural resonances.

Abstract

Storing and delaying optical signals plays a crucial role in data centers, phased array antennas, communication and future computing architectures. Here, we show a delay scheme based on cascaded Brillouin light storage, that achieves multi-stage delay at arbitrary positions within a photonic integrated circuit. Importantly these multiple resonant transfers between the optical and acoustic domain are controlled solely via external optical control pulses, allowing cascading of the delay without the need of aligning multiple structural resonances along the optical circuit.