title: All-optical isolation by directional coupling.
abstract: A nonlinear phase defect inserted in a coherent coupler can realize an effective all-optical diode. Basic features, design criteria, and suggested implementations are discussed with reference to Kerr-like media.
authors.affiliation: Nonlinear Optics and OptoElectronics Lab (NooEL), University "Roma Tre," Via della Vasca Navale 84, 00146, Rome, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Alberucci
authors.forename: Gaetano
authors.initials: G
authors.lastname: Assanto