Published June 2025 | Version Published
Journal Article Open

Dispersive-wave-agile optical frequency division

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Jet Propulsion Lab
  • 3. ROR icon University of California, Santa Barbara
  • 4. Anello Photonics, Santa Clara, CA, USA

Abstract

The remarkable frequency stability of resonant systems in the optical domain (optical cavities and atomic transitions) can be harnessed at frequency scales accessible by electronics using optical frequency division. This capability is revolutionizing technologies spanning time keeping to high-performance electrical signal sources. A version of the technique called two-point optical frequency division (2P-OFD) is proving advantageous for application to high-performance signal sources. In 2P-OFD, an optical cavity anchors two spectral endpoints defined by lines of a frequency comb. The comb need not be self-referenced, which greatly simplifies the system architecture and reduces power requirements. Here, a 2P-OFD microwave signal source is demonstrated with record-low phase noise using a microcomb. Key to this advance is a spectral endpoint defined by a frequency-agile single-mode dispersive wave that is emitted by the microcomb soliton. Moreover, the system frequency reference is a compact all-solid-state optical cavity with a record Q factor. A hybridly packaged version of the system offers excellent longer term stability. The results advance integrable microcomb-based signal sources into the performance realm of much larger microwave sources.

Copyright and License

© 2025, The Author(s). Open Access. This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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. 

Acknowledgement

We thank I. Kudelin, F. Quinlan and S. Diddams at NIST, X. Yi at University of Virginia for fruitful discussions, as well as M. Gao, J. Ge, Y. Yan and Z. Yuan at Caltech for experimental assistance. This work is supported by the Defense Advanced Research Projects Agency GRYPHON programme (grant no. HR0011-22-2-0009), NASA USTP (University Smallsat Technology Partnership, award ID no. 80NSSC23M0239), the Intelligence Advanced Research Projects Activity (IARPA) via the Department of Interior/Interior Business Center (DOI/IBC) contract no. 140D0423C0112, and the Kavli Nanoscience Institute at Caltech. The research reported here was performed by W.Z., A.S., V.I. and A.M. at the Jet Propulsion Laboratory at the California Institute of Technology, under a contract with the National Aeronautics and Space Administration (grant no. 80NM0018D0004). The US Government is authorized to reproduce and distribute reprints for Governmental purposes notwithstanding any copyright annotation thereon. Disclaimer: The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of DARPA, IARPA, DOI/IBC or the US Government.

Data Availability

The data that support the plots within this paper and other findings of this study are available on figshare at https://doi.org/10.6084/m9.figshare.27676482. All of the other data used in this study are available from the corresponding authors on reasonable request.

Supplemental Material

Supplementary Figs. 1–4 and Discussion. See attached:

  • 41566_2025_1667_MOESM1_ESM.pdf (supplemental file)
  • 41566_2025_1667_MOESM2_ESM.zip (supplementary data)

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Additional details

Related works

Describes
Journal Article: https://rdcu.be/faNm0 (URL)

Funding

Defense Advanced Research Projects Agency
GRYPHON programme HR0011-22-2-0009
National Aeronautics and Space Administration
USTP (University Smallsat Technology Partnership 80NSSC23M0239
United States Department of the Interior
Intelligence Advanced Research Projects Activity (IARPA) 140D0423C0112
California Institute of Technology
Kavli Nanoscience Institute

Dates

Available
2025-05-23
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