Coexistence of Discrete-Variable QKD with WDM Classical Signals in the C-Band for Fiber Access Environments. - Dimitris Zavitsanos; Giannis Giannoulis; Adam Raptakis; Christos P. Papapanos; Fotini Setaki; Eleni Theodoropoulou; George L. Lyberopoulos; Christos Kouloumentas; Hercules Avramopoulos (ICTON, 2019)