Abstract: A method of enhancing FSO (Free Space Optics) communications is disclosed including using dual or multiple beam divergence rates to increase the reliability of detection of optically received signals by transmitting the same information signal via multiple transmitters, each transmitter transmitting the information signal with a divergence rate different from the other transmitters. Using multiple divergence rates provides sufficient beam and/or signal density for reliable detection at the receiving end while also maintaining beam alignment. Active tracking of beams is improved by reducing operating frequency thresholds, and thus, system cost, needed for tracking the beam.