A three-soliton structure with strong and weak coupling in a wide-aperture laser with saturable absorption

A soliton complex consisting of three laser solitons is found with the help of numerical simulation of the spatiotemporal structure of the field in a wide-aperture class-A laser with saturable absorption in the mean field approximation with respect to the longitudinal coordinate. Two solitons are strongly coupled and rotate, whereas the third one is weakly coupled with this pair of solitons and revolves around it with a smaller angular velocity. A phase portrait of transverse energy fluxes of radiation that corroborates this type of coupling between the solitons is presented.