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. 2024 Jan 22;10:13. doi: 10.1038/s41378-023-00646-5

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© The Author(s) 2024

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 Comparison of fiber light transmission before (top) and after tapering. b Diagram of static and quasistatic etching process: (1) unetched fiber and legend, (2–3) static etching process, (4–5) quasistatic etching process depicting motion of fiber. c Image of the statically etched fiber tip, approximate profile, and frequency response of fiber displacement in the X & Z directions (air damping = 0.0115). d Image of quasistatically etched fiber, approximate profile, and frequency response of fiber displacement in the X & Z directions (air damping = 0.0115)