title: Feature issue introduction: Nonlinearity mitigation for coherent transmission systems.
abstract: The authors introduce the feature issue on nonlinearity mitigation for coherent transmission systems.
authors.forename: Magnus
authors.initials: M
authors.lastname: Karlsson
authors.forename: Nikola
authors.initials: N
authors.lastname: Alic
authors.forename: Sethumadhavan
authors.initials: S
authors.lastname: Chandrsekhar
authors.forename: Antonio
authors.initials: A
authors.lastname: Mecozzi