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Dispersive-wave induced noise limits in miniature soliton microwave sources

Yang, Qi-Fan and Ji, Qing-Xin and Wu, Lue and Shen, Boqiang and Wang, Heming and Bao, Chengying and Yuan, Zhiquan and Vahala, Kerry (2021) Dispersive-wave induced noise limits in miniature soliton microwave sources. Nature Communications, 12 . Art. No. 1442. ISSN 2041-1723.

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Compact, low-noise microwave sources are required throughout a wide range of application areas including frequency metrology, wireless-communications and airborne radar systems. And the photonic generation of microwaves using soliton microcombs offers a path towards integrated, low noise microwave signal sources. In these devices, a so called quiet-point of operation has been shown to reduce microwave frequency noise. Such operation decouples pump frequency noise from the soliton’s motion by balancing the Raman self-frequency shift with dispersive-wave recoil. Here, we explore the limit of this noise suppression approach and reveal a fundamental noise mechanism associated with fluctuations of the dispersive wave frequency. At the same time, pump noise reduction by as much as 36 dB is demonstrated. This fundamental noise mechanism is expected to impact microwave noise (and pulse timing jitter) whenever solitons radiate into dispersive waves belonging to different spatial mode families.

Item Type:Article
Related URLs:
URLURL TypeDescription
Yang, Qi-Fan0000-0002-7036-1712
Ji, Qing-Xin0000-0002-6336-8350
Wu, Lue0000-0002-7503-7057
Shen, Boqiang0000-0003-0697-508X
Wang, Heming0000-0003-3861-0624
Bao, Chengying0000-0003-0697-508X
Vahala, Kerry0000-0003-1783-1380
Additional Information:© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit Received 27 September 2020; Accepted 03 February 2021; Published 04 March 2021. We thank S. Papp at NIST for helpful comments during the preparation of this manuscript, N. M. Kondratiev for discussion on simulation of thermorefractive noise, as well as X. Zhang for help on simulation of the dispersive wave. The authors gratefully acknowledge the Defense Advanced Research Projects Agency under the APhI program (Award FA9453-19-C-0029) and the Kavli Nanoscience Institute. Q.-X.J. thanks the Caltech SURF program. Data availability: The data that support the plots within this paper and other findings of this study are available on figshare ( All other data used in this study are available from the corresponding author upon reasonable request. Code availability: The codes that support the findings of this study are available from the corresponding authors upon reasonable request. These authors contributed equally: Qi-Fan Yang, Qing-Xin Ji, Lue Wu. Author Contributions: Experiments were conceived and designed by Q-F.Y., Q-X.J. and K.V. Measurements are performed by Q-F.Y. and Q-X.J. with assistance from L.W., B.S., C.B. and Z.Y. Devices are fabricated and packaged by L.W. Modelling is performed by Q-F.Y., Q-X.J., H.W. and B.S. All authors participated in preparing the manuscript. The authors declare no competing interests. Peer review information: Nature Communications thanks the anonymous reviewers for their contribution to the peer review of this work. Peer reviewer reports are available.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)FA9453-19-C-0029
Kavli Nanoscience InstituteUNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:Micro-optics; Nonlinear optics; Solitons
Record Number:CaltechAUTHORS:20210304-153236998
Persistent URL:
Official Citation:Yang, QF., Ji, QX., Wu, L. et al. Dispersive-wave induced noise limits in miniature soliton microwave sources. Nat Commun 12, 1442 (2021).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108316
Deposited By: Tony Diaz
Deposited On:04 Mar 2021 23:45
Last Modified:04 Mar 2021 23:45

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