Abstract
A Digital Voice Communication system has been designed and practically implemented which utilizes laser beams for data transmission through the atmosphere or vacuum. Commercially available 650nm red laser pointers and PIN photodiodes have been used as the light source and the optical signal receiver respectively. Owing to their innate wide bandwidth, feasibility and no license requirement, optical wireless communication systems are alluring for providing broadband services.So optical wireless communication renders an unorthodox substitute for radio frequency communication in indoor use and other applications where line of sight communication is viable. The digital voice communication system has been designed for better performance and noise immunity. It also propounds secure data transmission. This micro-controller based simplex optical wireless voice communication system has been tested and found to be successfully working.
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