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. 2021 Nov 19;11:22619. doi: 10.1038/s41598-021-02112-6

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© The Author(s) 2021

Open AccessThis 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 licence, and indicate if changes were made. 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. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Output power as power in the bucket (aperture diameter 30 mm) as function of the input power. In (a), the mean value of the complete laser-on-time of three pulse trains (each 5 pulses of 0.1 s duration) is shown. Only for the larger spot diameters a linear behaviour is observed. In (b), only the power in the bucket at the beginning of the first pulse is plotted. Here, the power in the bucket is still a linear function with the input power for the smallest spot diameter. The green and orange lines are guide to the eyes for two different absorption coefficients.