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.
© 2008 Optical Society of America
Original Manuscript: December 19, 2007
Revised Manuscript: March 18, 2008
Manuscript Accepted: March 18, 2008
Published: April 30, 2008
L. Columbo, L. Gil, and J. Tredicce, "Could cavity solitons exist in bidirectional ring lasers?," Opt. Lett. 33, 995-997 (2008)