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We demonstrate that necklace-shaped arrays of localized spatial beams canmerge into stable fundamental or vortex solitons in a generic model of lasercavities, based on the two-dimensional complex Ginzburg-Landau equation withthe cubic-quintic nonlinearity. The outcome of the fusion is controlled by thenumber of beads in the initial necklace, 2N, and its topological charge, M. Wepredict and confirm by systematic simulations that the vorticity of theemerging soliton is the absolute value of difference of N and M. Thresholdcharacteristics of the fusion are found and explained too. If the initialradius of the array (R0) is too large, it simply keeps the necklace shape (ifR0 is somewhat smaller, the necklace features a partial fusion), while, if R0is too small, the array disappears.

Fusion of necklace-ring patterns into vortex and fundamental solitons in dissipative media