927-km End-to-End Interoperable 400-GbEthernet Optical Communications through 2-km 400GBASE-FR4, 8×100-km 400G-OpenROADM and 125-km 400-ZR Fiber Lines. - Erwan Pincemin; Yann Loussouarn; Abraham Sotomayor; Giacomo Losio; Mary McCarthy; Lee Nelson; Anuj Malik; Ian Riggs; Torben Nielsen; Tom Williams 005; Alberto Gaibazzi; Lei Zhang; et al. (OFC, 2022)