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With a block diagram explain fiber optic communication system
Ans: The block diagram of a fiber optic communication system is display below:
The input signal is given to coder or converter that converts the input signal within appropriate code. The output from the converter is given to the light source. The light source might be an LED or ILD. To couple along with the fiber, we requires a source to fiber interface, we use source to fiber coupler. It is a mechanical interface to couple the light emitted through the source into optical fiber. Then the light is transmitted by the optical fiber. We use repeaters in among the fibers to compensate the signal losses while it passes by the fiber.
In the receiver section there is fiber to light interface is required to couple along with the fiber. Then the light is given to the light detector. We use PIN diode or APD (Avalanche Photo Diode) to convert the light energy to current. After that the electrical source is amplified to compensate the losses and then decoded to obtain the signal at the destination.
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