Critical coupling in Cavity Resonator Integrated Grating Filters (CRIGFs) for SHG controlOlivier Gauthier-Lafaye, Stéphane Calvez, Antoine Monmayrant, Elizabeth Hemsley, Anne-Laure Fehrembach and Evgueni PopovEPJ Web Conf., 287 (2023) 06007DOI: https://doi.org/10.1051/epjconf/202328706007