Critical coupling in Cavity Resonator Integrated Grating Filters (CRIGFs) for SHG control Olivier Gauthier-Lafaye, Stéphane Calvez, Antoine Monmayrant, Elizabeth Hemsley, Anne-Laure Fehrembach and Evgueni Popov EPJ Web Conf., 287 (2023) 06007 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328706007