Safety Security and Risk Management - Aftermath Bhopal Disaster

Abstract

This paper involves building a scaled down, simple laser communication system that is used to send audio signals over a distance. The free space communication system used here consists of a transmitter that super imposes an audio signal into a light source. The receiver contains a photo detector and is connected only through an optical path with the transmitter, with air as the free space medium. The light source is a laser diode and the detector is a semiconductor-based photoresistor made of Cadmium Sulfide (CdS).