Gómez Varela, Ana IsabelRey García, F.Francisco, I. deFlores Arias, María TeresaFuente, G.F. de laBao Varela, María del Carmen2025-12-032025-12-032020-04-30Gómez-Varela, A. I., Rey-García, F., de Francisco, I., Flores-Arias, M. T., de la Fuente, G. F., & Bao-Varela, C. (2020). Fabrication of cylindrical active GRIN media by laser-assisted radial dopant diffusion: A proof of concept. Results in Physics, 17, 103142. doi:10.1016/j.rinp.2020.1031422211-3797https://hdl.handle.net/10347/44210This work introduces a new approach to prepare active GRadient-INdex (GRIN) materials by gradually doping commercial silica cylindrical substrates with different optically active ions or materials by the Laser Zone Melting (LZM) process. Scanning Electron Microscopy (SEM) combined with energy dispersive X-ray (EDX) analysis demonstrate that the dopants are gradually incorporated into the cylindrical substrate under controlled penetration depths. This simple, environmentally respectful fabrication method opens the possibility to manufacture versatile GRIN optical elements on a large scale and reduced cost.eng© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/)http://creativecommons.org/licenses/by-nc-nd/4.0/GRIN opticsLaser zone meltingActive mediaBeam shapingScanning electron microscopyjournal article10.1016/j.rinp.2020.103142open access