Abstract
Free space optics is a line-of-sight technology, which uses LASERS and Photo detectors to provide optical connections between two points—without the fiber. Increased needs for bandwidth require technology that goes beyond traditional copper lines. The technology advancement in internet scales faster than Moore's law which makes it infeasible to dig installed lines in metropolitan areas; the industry now realized the benefits of free space optical communication. Free-space optical (FSO) communication links are attractive because they provide a means of low cost, high bandwidth, reduced time-to-market, secure and are a reliable means of communications. This paper describes the benefits of FSO along with operation of such links working outdoors in an open atmosphere under various effecting field parameters such as atmospheric attenuation, beam divergence and scintillation where the performance of FSO link is evaluated in terms of transmitted and received power.
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