title: Could cavity solitons exist in bidirectional ring lasers?
abstract: We show numerically that bright and dark cavity solitons can be obtained in bidirectional class A ring lasers only if the phase invariance of the electromagnetic field is broken. The phase invariance symmetry is responsible for the existence of phase waves, which generate long-range interactions destroying the property of independence among otherwise localized structures. We improved the usual model describing such types of lasers, and we prove that it leads to genuine cavity solitons.
authors.affiliation: Institut du Non Linéaire de Nice (U.M.R. C.N.R.S 6618), Université de Nice Sophia Antipolis, 1361 Route des Lucioles, F-06560 Valbonne, France.
authors.forename: L
authors.initials: L
authors.lastname: Columbo
authors.forename: L
authors.initials: L
authors.lastname: Gil
authors.forename: J
authors.initials: J
authors.lastname: Tredicce