We examine the existence and stability of discrete spatial solitons in coupled nonlinear lasing cavities (waveguide resonators), addressing the case of active defocusing media, where the gain exceeds damping in the low-amplitude limit. A new family of stable localized structures is found: these are bright and gray cavity solitons representing the connections between homogeneous and inhomogeneous states. Solitons of this type can be controlled by discrete diffraction and are stable when the bistability of homogenous states is absent.
© 2012 Optical Society of America
Original Manuscript: June 15, 2012
Revised Manuscript: August 28, 2012
Manuscript Accepted: September 17, 2012
Published: November 6, 2012
Jaroslaw E. Prilepsky, Alexey V. Yulin, Magnus Johansson, and Stanislav A. Derevyanko, "Discrete solitons in coupled active lasing cavities," Opt. Lett. 37, 4600-4602 (2012)