Basic concept of free space optics communication (FSO): An overview

Now a days the wireless technology has become popular in the wireless system. FSO is a technology that uses the visible to near infrared (NIR) light propagating through the atmosphere to transmit information. FSO communications are attracting attention as the contemporary engineering science to resolve the last mile bottleneck issues in local area access networks due to their high bandwidth, low cost implementation in a non-licensed spectrum, relatively low power using up and security compared with RF technologies. Equally we know that the free space optical communication is extremely impressed by the various atmospheric conditions which cause the degradation of the carrying out of FSO link. This report introduces the study of the issue of the various atmospheric conditions on the FSO link. This report includes the result of the fog by analysis the various fog models such as Kim Model, Kruse Model. And also analysis the wet and dry snow over the FSO links.