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https://hdl.handle.net/2440/136086
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Type: | Journal article |
Title: | Self-calibrating programmable photonic integrated circuits |
Author: | Xu, X. Ren, G. Feleppa, T. Liu, X. Boes, A. Mitchell, A. Lowery, A.J. |
Citation: | Nature Photonics, 2022; 16(8):595-602 |
Publisher: | Springer Science and Business Media LLC |
Issue Date: | 2022 |
ISSN: | 1749-4885 1749-4893 |
Statement of Responsibility: | Xingyuan Xu, Guanghui Ren, Tim Feleppa, Xumeng Liu, Andreas Boes, Arnan Mitchell, and Arthur J. Lowery |
Abstract: | Programmable photonic integrated circuits (PICs) are dense assemblies of tunable elements that provide flexible reconfigurability to enable different functions to be selected; however, due to manufacturing variations and thermal gradients that affect the optical phases of the elements, it is difficult to guarantee a stable correspondence between the electrical commands to the chip, and the function that it provides. Here we demonstrate a self-calibrating programmable PIC with full control over its complex impulse response, in the presence of thermal cross-talk between phase-tuning elements. Self-calibration is achieved by: (1) incorporating an optical reference path into the PIC; (2) using the Kramers–Kronig relationship to recover the phase response from amplitude measurements; and (3) applying a fast-converging self-calibration algorithm. We demonstrate dial-up signal processing functions with complex impulse responses using only 25 training iterations. This approach offers stable and accurate control of large-scale PICs, for demanding applications such as communications network reconfiguration, neuromorphic hardware accelerators and quantum computers. |
Rights: | Copyright © 2022, The Author(s), under exclusive licence to Springer Nature Limited |
DOI: | 10.1038/s41566-022-01020-z |
Grant ID: | http://purl.org/au-research/grants/arc/DP190101576 http://purl.org/au-research/grants/arc/DP190102773 |
Published version: | http://dx.doi.org/10.1038/s41566-022-01020-z |
Appears in Collections: | Electrical and Electronic Engineering publications IPAS publications |
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