19-07-2012, 02:42 PM
Free Space Optics (FSO)Technology
Free Space Optics .ppt (Size: 1.29 MB / Downloads: 48)
INTRODUCTION
FSO is a wireless technology that transmit data via laser beams
FSO uses a light to transmit data between buildings that have a clear line of sight(LOS)
Currently it can allow up to 2.5gbps of data rate but can increases to 10gbps using WDM
FSO is based on connectivity between two stations consisting of optical transcivers with a laser Tx and laser RX to provide full duplex communication
Free space link behave a similarly to a fiber optic system
Need for FSO
Fso can send large amount of data(around 2.5 gbps of data)
No need to get licence,the spectrum used is an unlicensed world wide
Can transmit data at distance around 8km(almost 4 and half miles)
The cost is often less than that of using fiber optic cables
Fso system can be installed quickly(in days)
Because it used light there is no RF interference
Transmission security
Beams only a few meters in diameter at a kilometer
Allows a very close spacing of links without interference
No side lobes
Highly secure
Efficient use of energy
Ranges of 20m to more than 8km possible
The FSO “Value Proposition”
No interference
Unlicensed
Easy to install
Through the window (or from the rooftop)
No trenching, no permits
Fiber-like data rates
Many deployment options