The optical communication is one of the important systems in the field of communication. to communicate between two locations, there need to use an adjustable light source to send photons or light wave to the light sensitive photodetector which can detect or collect the light waves. for the first consideration of the system the laser beam transmitter is needed to be constructed. then the second part is to implement the laser beam receiver. modulated laser beam transmission is applied in communication. semiconductor laser diedo is used as the light source. the receiver is tuned to receive the modulated laser and rejecting the unmodulated wave. the third part of the system is interfacing. it is to be constructed to convert analog signal to be proceed for computer for futher processing. this analog to digital converter hardware circuit is then interfaced with computer line printer port for the purpose of getting information of the incoming signal from the hardware circuit. the communication range is mainly depend on the intensity of the laser diode,transmissitivity and the sensitivity of the photodector.