An Optical Network Emulator for Testing OpenROADM Controller and Training Students. - Tianliang Zhang; Muhammad Ridwanur Rahim; Salem Blue Davidson; Brandon Hunter Grona-Gardom; Cristina Marie Kobierowski; Nathan Ellsworth; Gilles Thouénon; Christophe Betoule; Olivier Renais; Andrea Fumagalli (OFC, 2023)