Research Interests: Free Space Optics(FSO)

Free –space optics (FSO), also called free-space photonics(FSP),refers to the transmission of modulated visible or infrared (IR) beams thorogh the atmosphere to obtain broadband communications.Most frequently ,Laser beams are used ,also nonlasing source such as light –emitting diodes (LED s) or IR emitting-diodes (IRED s)will surve the purpose.The theory of FSO is essentially the same as that for fiber optic transmission .The diffrence is that the energy beam is collimated and sent through clear air or space from the source to the destination,rather than guided through an optical fibe.FSO systems can function over distances of several kilometers .as long as there is a clear line of sight between the source and the destination,communication is theoretically possible.

Although FSO systems can be a good solution for some broadband networking needs,there are limitations .Most significant is the fact that rain ,dust,snow, fog, or smog  can block the transmission path and shut down the network.