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. 2020 May 11;11:2336. doi: 10.1038/s41467-020-15914-5

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© The Author(s) 2020

Open Access 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 http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Conceptual schematic: a phase-matched microfiber is used to couple pump laser into the deformed cavity and it also collects comb emissions at the through port. A nanofiber is used at the drop port to output comb light through chaos-assisted coupling. b Three-dimensional finite difference time-domain (3D FDTD) simulation of the coupling efficiencies of both phase-matched coupling and chaos-assisted coupling. c, d Optical spectra of the frequency combs with phase-matched coupling (blue) and chaos-assisted coupling (red) in infrared (c) and visible (d) regions.