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A linear array of three identical lasers that are coupled mutually in space is investigated theoretically by integration of the laser equations. It is shown that the generalized synchronization of phase differences in the laserfields appears with intermediate coupling when the laser intensities are totally chaotic and chaotically synchronized. Both intensities and phase differences are totally chaotic at smaller coupling constants. The lasers are alsochanged from coherent to incoherent light when the couplings between lasers are decreased.