doi:10.3390/mi13122253engPons, CarolinaGalindo, Josué M.Martín, Juan C.Torres-Moya, IvánMerino, SoniaHerrero, M. AntoniaVázquez, EsterPrieto, PilarVallés, Juan A.Propagation Losses Estimation in a Cationic-Network-Based Hydrogel WaveguideART-2022-132428A method based on the photographic recording of the power distribution laterally diffused by cationic-network (CN) hydrogel waveguides is first checked against the well-established cut-back method and then used to determine the different contributions to optical power attenuation along the hydrogel-based waveguide. Absorption and scattering loss coefficients are determined for 450 nm, 532 nm and 633 nm excitation. The excellent optical loss values obtained (0.32–1.95 dB/cm), similar to others previously described, indicate their potential application as waveguides in different fields, including soft robotic and light-based therapies.2022http://zaguan.unizar.es/record/12385810.3390/mi13122253http://zaguan.unizar.es/record/123858oai:zaguan.unizar.es:123858info:eu-repo/grantAgreement/ES/DGA-FEDER/E44-20Rinfo:eu-repo/grantAgreement/EC/H2020/881603/EU/Graphene Flagship Core Project 3/GrapheneCore3This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 881603-GrapheneCore3Micromachines 13, 12 (2022), 2253 [9 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess