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Journal: International Journal of Engineering Sciences & Research Technology (IJESRT) (Vol.4, No. 5)

Publication Date:

Authors : ; ;

Page : 284-288

Keywords : Audio communication system; laser; free space optical communication; visible light communicatio;

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This paper involves building a scaled down, simple laser communication system that is used to send audio signal s 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 se miconductor - based photoresistor made of Cadmium Sulfide (CdS)

Last modified: 2015-05-22 22:39:43