Design and Implementation of Optical Wireless Communication System

Abstract

In this paper, we have designed and constructed an optical communication system to transmit two-voice channel full duplex technique with line of sight, which uses a laser beam as a carrier wave in free space. The constructed system consists of a tranciever (transmitter and receiver ) for both sides. The transmitter part includes a laser source and other transmitter accessories as well as a receiver component. Pulse code modulation (PCM) technique has been used to transmit voice signal. High quality sound communication link for a distance reaching about 1300m is achieved with signal to noise ratio (S/N) equal to 21.1 dB.