Kerr nonlinearity compensation in a 5×28-GBd PDM 16-QAM WDM system using fiber-based optical phase conjugation. - Francesco Da Ros; Isaac Sackey; Robert Elschner; Thomas Richter 004; Christian Meuer; M. Nolle; Mahmoud Jazayerifar; Klaus Petermann; Christophe Peucheret; Colja Schubert (ECOC, 2014)