Free space or wireless optical communication (WOC) is significantly better thanfiber optic communication. Since transmission is through free space, it will be faster than the other one.Methods/Analysis: Optical transceivers are used as relays for the effective performance of the WOC system. Relay assisted WOC communication recognizes the fact that atmospheric turbulence fading variance is dependent on the distance and gives significant performance gains by taking the shorter hops. Findings: A combined channel model can be used which considers both pathloss and turbulence-induced log-normal fading.The optimal relay locations as to reduce the outage probability in hybrid relaying technique have been analyzed and discussed by the application of metaheuristic algorithms such as firefly algorithm, invasive weed optimization algorithm, particle swarm optimization algorithm, shuffled frog leap algorithm etc. Novelty /Improvement:Weed Optimization is found to be the best technique among all applied algorithms.Hence it has been implemented to parallel relaying technique and then the output again considered as input to the serial relay placement. The outage probability vs power margin graph shows the result analysis of this hybrid structure. © International Science Press.