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oai:gredos.usal.es:10366/1466452025-04-30T20:35:43Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Vázquez de Aldana, Javier R. Romero Vázquez, Carolina Fernandez, Joaquín Gorni, Giulio Pascual, María Jesús Durán Carrera, Alicia Balda, Rolindes 2021-06-02T07:05:28Z 2021-06-02T07:05:28Z 2020-10 Vázquez de Aldana, J.R., Romero, C., Fernandez, J., Gorni, G., Pascual, M.J., Duran, A. and Balda, R. (2020). Femtosecond laser direct inscription of 3D photonic devices in Er/Yb-doped oxyfluoride nano-glass ceramics. Opt. Mater. Express 10, 2695-2704 http://hdl.handle.net/10366/146645 10.1364/OME.402271 2159-3930 [EN]The fabrication of optical waveguides by direct femtosecond laser irradiation in Er3+/Yb3+ oxyfluoride nano-glass ceramics is investigated. Following the strategy of single line irradiation, a wide range of laser parameters can be used to obtain single-mode waveguides with nearly-gaussian modal profiles, in the visible and near-infrared. Measured propagation loss is 1.6 dB/cm for the optimum parameters (0.34 μJ/pulse and 20 μm/s scanning velocity), with no annealing after irradiation, and the induced refractive index contrast is Δn∼0.006 (at 800 nm). The multi-scan technique is used to gain control of the refractive index profiles thus producing multimodal structures. The active behavior of the waveguides is induced under ∼800 nm seeding and the co-propagating guidance of the erbium emission is demonstrated. The integration of photonic elements such as Y-splitters, both in 2D and 3D, as well as Mach-Zehnder interferometers, is also shown. Results demonstrate the optimum behavior of Er3+/Yb3+ oxyfluoride nano-glass ceramics as a host material for the integration of complex active photonic devices by femtosecond laser irradiation in the low repetition rate regime. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Erbium lasers Femtosecond lasers Laser irradiation Laser ranging Planar waveguides Refractive index Femtosecond laser direct inscription of 3D photonic devices in Er/Yb-doped oxyfluoride nano-glass ceramics info:eu-repo/semantics/article