==== Front Sci Rep Sci Rep Scientific Reports 2045-2322 Nature Publishing Group UK London 37789 10.1038/s41598-023-37789-4 Author Correction Author Correction: Femtosecond laser induced low propagation loss waveguides in a lead-germanate glass for efficient lasing in near to mid-IR Khalid Mamoona khamy062@mymail.unisa.edu.au 1 Chen George Y. 1 Ebendorff‑Heidepreim Heike 2 Lancaster David G. 1 1 grid.1026.5 0000 0000 8994 5086 Laser Physics and Photonics Devices Laboratory (LPPDL), University of South Australia, Mawson Lakes, SA 5095 Australia 2 grid.1010.0 0000 0004 1936 7304 Institute for Photonics and Advanced Sensing and School of Physical Sciences, University of Adelaide, Adelaide, SA 5000 Australia 30 6 2023 30 6 2023 2023 13 10649© The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/ 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 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/. issue-copyright-statement© Springer Nature Limited 2023 ==== Body pmcCorrection to: Scientific Reports 10.1038/s41598-021-90249-9, published online 24 May 2021 The original version of this Article contained an error in the legend of Figure 1a, where a reference was omitted. The reference is listed below as Reference 20. 20. Grenier, J.R., Fernandes, L.A. & Herman, P.R. Femtosecond laser writing of optical edge filters in fused silica optical waveguides. Opt. Express 21, 4493–4502. https://doi.org/10.1364/OE.21.004493 (2013). “(a) FSL material processing setup for WG writing. The sample is moved transversely with respect to the FSL focus to inscribe tracks/lines of index modifications. The cross-section of the single line FSL modified region presented in the sample is the heat accumulated region (thermal writing regime). (b) Ray schematic showing the estimated change in writing depth [from d = 150 μm to d’ = 234 μm (FSL estimated focus)] through a low refractive index n = 1.51 index matching oil to a high refractive index sample (n’ = 1.82). θ and θ’ are the angle of refraction of the focusing beams (for actually set and estimated writing depths) with respect to incidence normal.” now reads: “(a) FSL material processing setup for WG writing. The sample is moved transversely with respect to the FSL focus to inscribe tracks/lines of index modifications. The cross-section of the single line FSL modified region presented in the sample is the heat accumulated region (thermal writing regime). Reproduced with permission from20. (b) Ray schematic showing the estimated change in writing depth [from d = 150 μm to d’ = 234 μm (FSL estimated focus)] through a low refractive index n = 1.51 index matching oil to a high refractive index sample (n’ = 1.82). θ and θ’ are the angle of refraction of the focusing beams (for actually set and estimated writing depths) with respect to incidence normal.” As a result, the subsequent References have been renumbered. The original Article has been corrected.