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. 2017 Jun 29;8:42. doi: 10.1038/s41467-017-00033-5

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© The Author(s) 2017

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 — Optical properties of CS₂/silica step-index fibres. a GVD map: the spectral position of the ZDW for various core diameters (at 20 °C, 1 atm). AD anomalous dispersion, ND normal dispersion. The black marks indicate the work by other groups reported earlier. The red star refers to the experiments reported here. b Transmission microscope picture of a filled liquid-core step-index fibre and c electron microscope image of the capillaries used in this work. d GVD and nonlinear coefficient of the fundamental mode (HE₁₁) of the CS₂/silica fibre. e Estimated modal attenuation coefficient α _m compared to 1 m bulk CS₂ absorption measured up to 2.15 μm. The vertical dashed line indicates the pump wavelength λ _p