Selection of path and wavelength for setting up a free space optical link

In this paper, we investigate how to determine the optimal path and the wavelength for setting up a free space optical (FSO) link at our college campus. We consider serial relay assisted FSO system, employing both decode-and-forward and amplify-and-forward modes. We consider an aggregated channel model that considers both path-loss and turbulence induced lognormal fading. We derive outage probability for the relaying scheme under consideration and then find outage probability of all the available paths at different wavelengths to determine the optimal path and the wavelength.