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. 2019 Feb 11;9:1783. doi: 10.1038/s41598-018-38183-1

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© The Author(s) 2019

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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Simulated influence of the taper angle. (a) Dynamics observed during laser operation while increasing the pump current for taper angles between Θ = 0° and Θ = 3°. Fundamental mode-locking (FML), unstable fundamental mode-locking (uFML), third-order harmonic mode-locking (HML3), unstable third-order harmonic mode-locking (uHML3), Q-switched mode-locking (QSML) and continuous-wave (cw) are observed and color coded. (b) peak output power and (c) pulse width obtained from intensity auto-correlations. The black lines in all plots indicate the parameter range shown in Fig. 2.