Design and implementation of free space simplex video–laser communication system

Abstract EN

Abstract The optical communication system consists of a transmitter uses a laser beam of a wavelength 650 nm as a carrier in free space, and a receiver uses PIN diode as a detector .

In both sides Intensity modulation (IM) technique has been used to transmit video signal of a frequency range (0~5) MHz band width.

The video signal fed by camera.

The transmitted signal amplified and converted to a modulated intensity of laser beam and sent to the receiver, the receiver converts the laser signal to a weak electrical signal by the detector; the signal will be amplified and converted back to an analogue signal to produce the original transmitted signal, and monitored by TV set in (black and white ) .

The transmission range was 5 m , that can be developed letter for longer range.-