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. 2022 Oct 24;17(1):59–64. doi: 10.1038/s41566-022-01088-7

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© The Author(s) 2022

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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Extended Data Fig. 7 — The piezo stage was calibrated with the spectrometer presented in this paper. A laser with a wavelength of 1550 nm was coupled into the spectrometer and the photo signal of the stationary wave was recorded over 100 μm mirror displacement (piezo travel range). A fast Fourier transformation resulted in a slight offset from the expected value giving rise to a calibration value of 0.9764. Therefore, the real piezo stage travel distance was 97.64 μm.

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