Study of Nonlinearities in FSO Communication System: A Detailed Review

Abstract

Abstract In the world of today where growing demand for a fast, reliable and secured communication system for the growing population of the world is in dire need, the Free Space Optics (FSO) provides a very good alternative to the conventional RF communication. When compared in terms of free space communication it is better than RF communications in some aspects. Also in regard to optical mode of communication, it is superior to fiber optics when it comes to surpassing the geographical installation related issues and being the “last mile” solution to the impeding problem of providing access of communication link to remote areas across the world. FSO also offers a good access for local operation usage in civil and military areas. Considering such wide usage and promising future applications of FSO technology, this paper brings out various challenges presently faced in the usage of FSO communication system. In the present paper study of non linearities faced and a brief discussion regarding possible mitigation techniques has been carried out.