Communication
Faithful transmission of information from one place to another place is called communication. Optical fibres are used in optical communication.
Communication System
A communication system contains three main parts
( i) Transmitter It process and encode the information and make it suitable for transmission. The message signal for communication can be analog signals or digital signals.
An analog signal can be converted suitably into a digital signal and vice-versa.
[ An analog signal is that in which current or voltage value varies continuously with time.
A digital signal is a discontinuous function of time. Such a signal is usually in the form of pulses.]