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Fiber Optic Analog and Digital Link
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Fiber-optic communications is the method of transmitting data from one point to another by sending pulses of light through an optical fiber. Optical fiber is a waveguide made of very thin tubes of glass whose diameter is of the order of a few micrometers. Here the optical fiber works on the principle of ‘Total Internal Reflection’.

 A block diagram of a fiber-optic communication system is shown below.

 

 

The process of communicating using an optical fiber involves the following -

a)      Converting electrical signal to optical signal at the transmitter.

b)      Transmission of optical signal to the cable.

c)       Relaying the signal through the optical-fiber.

d)      Receiving the optical signal at the detector.

e)      Converting the optical signal back to the electrical signal at the receiver.

 

 

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