Addressing the Fabrication Difficulties of Femtosecond Laser Written Surface Waveguides for Enhanced Evanescent CouplingVítor A. Amorim, João M. Maia, Duarte Viveiros and P. V. S. MarquesEPJ Web Conf., 215 (2019) 15003DOI: https://doi.org/10.1051/epjconf/201921515003