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.
Bibliographical noteThis paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-18-4321. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Funding: MSCA-COFUND-MULTIPLY - Grant number 713694 - H2020.
Stiller, B., Merklein, M., Wolff, C., Vu, K., Ma, P., Poulton, C. G., Madden, S. J., & Eggleton, B. J. (2018). On-chip multi-stage optical delay based on cascaded Brillouin light storage. Optics Letters, 43(18), 4321-4324. https://doi.org/10.1364/OL.43.004321