Abstract
Free-space optical communication (FSO) is a technology that entails the transmission of information through the atmosphere from one point to the other. Optical signal traversing the atmospheric channel suffers attenuation due to scattering and absorption of the signal by aerosols, fog, atmospheric gases. This work is focused on improving the performance of the system by increasing the capacity using WDM optical networks in free space using QAM modulation technique. The system is evaluated by using eight independent information sources and analyzing the BER and eye diagrams.
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