27-06-2012, 06:09 PM
LASER COMMUNICATION
laser comm.ppt (Size: 1.24 MB / Downloads: 97)
What Is Laser Communication
Laser communications systems are wireless connections through the atmosphere. They work similarly to fiber optic links, except the fact that, in lasers, beam is transmitted through free space.
What is the Transmitter?
The transmitter involves:
Signal processing electronics (analog/digital)
Laser modulator
Laser (visible, near visible wavelengths)
What is the Receiver?
The receiver involves:
Telescope (referred to as ‘antenna’)
Signal processor
Detector
Why not Fiber Optics?
Not always possible to lay fiber lines
Satellites
Combat zones
Physically / Economically not practical
Emergencies
LC being incorporated into fiber optic networks when fiber is not practical.
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What Is Laser Communication
Laser communications systems are wireless connections through the atmosphere. They work similarly to fiber optic links, except the fact that, in lasers, beam is transmitted through free space.
What is the Transmitter?
The transmitter involves:
Signal processing electronics (analog/digital)
Laser modulator
Laser (visible, near visible wavelengths)
What is the Receiver?
The receiver involves:
Telescope (referred to as ‘antenna’)
Signal processor
Detector
Why not Fiber Optics?
Not always possible to lay fiber lines
Satellites
Combat zones
Physically / Economically not practical
Emergencies
LC being incorporated into fiber optic networks when fiber is not practical.