Laser Communication: Shedding Some Light (original) (raw)

LASER is the mightier, newer ‘avtar’ of light. This wonder beam has penetrated in to normal life, more than any other form of concentrated energy. Today the word “LASER” is familiar to everyone due to the various manifestations of its potential, be it medicine, communication, defense or industry. It touches almost every part of nature. “Amplitude Modulation” is the basic principle of working of Laser Communication systems. The amplitude of the carrier signal is varied according to the instantaneous amplitude of the modulating signal. Here “Carrier refers to the Laser Beam” “Intensity of Laser Beam refers to the amplitude” “Input signal used as audio signal” Hence, the intensity of the laser beam is varied according to the instantaneous value of audio signal and the same is sensed by the optical sensor at the receiver. In this paper we will refer to the one of the applications of Laser Technology and the recent researches and experiment which are going around for lasers, such as NASA...

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