Implementation of FSO Link for Full Duplex Short Range Communication

Abstract

Extensive data transfer is a need of all modern communicating devices. Wired communication requires lots of bulky wires to be laid everywhere. To setup a small ad hoc network, it is not advisable to lay down long wires. Other than requirement of wires, one also needs very good communication speed to withstand the need of very high bandwidth for multimedia data transfer. A communication link that satisfies both the requirements is free space optical (FSO) communication. The paper aimed the setup of FSO link that is capable of carrying full duplex data at more than 100 kbps speed and can also transfer real-time audio data. Three transceiver modules are designed for communication purpose. The link is first simulated using Optsim tool and then implemented using standard microprocessors. The link is reliable and can achieve the BER of 10–7. The setup is tested for stored images, videos and real-time audio data.