Riccardo Veronese, Juan Carlos Alvarado-Zacarias, Sjoerd van der Heide, Rodrigo Amezcua Correa, Haoshuo Chen, Roland Ryf, Nicolas K. Fontaine, Marco Santagiustina, Andrea Galtarossa, Luca Palmieri: Distributed Supermode Coupling Measurements in Multi-Core Optical Fibers. OFC 2020: 1-3