title: Collapse arrest in instantaneous Kerr media via parametric interactions.
abstract: We demonstrate, theoretically and experimentally, that a four-wave mixing parametric interaction is able to arrest the collapse of a two-dimensional multicolor beam in an instantaneous Kerr medium. We consider two weak idlers interacting via a third order nonlinearity with two pump beams and we show that a class of collapse-free quasisolitary solutions can be experimentally observed in a normal dispersion Kerr glass. This observation is sustained by rigorous theoretical analysis demonstrating the stability of the observed self-trapped beams.
authors.affiliation: Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
authors.forename: Alessia
authors.initials: A
authors.lastname: Pasquazi
authors.affiliation: Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
authors.forename: Marco
authors.initials: M
authors.lastname: Peccianti
authors.affiliation: INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada and School of Engineering and Physical Sciences, Heriot-Watt University, SUPA, Edinburgh EH14 4AS, United Kingdom.
authors.forename: Matteo
authors.initials: M
authors.lastname: Clerici
authors.affiliation: ISC-CNR and Department of Physics, University Sapienza, Piazzale Aldo Moro 5, I-00185 Rome, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Conti
authors.affiliation: INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
authors.forename: Roberto
authors.initials: R
authors.lastname: Morandotti