The on-off light pulses produced by the transmitter are launched into the optical fiber wave guide. During the course of the propagation the light pulse suffers loss or attenuation that increases exponentially with the distance.
At the receiver the original input data are regenerated by performing three basic operations which are :
- Detection – the light pulses are converted back into pulses of electrical current.
- Pulse Shaping and Timing - This involves amplification, filtering and equalization of the electrical pulses, as well as the extraction of timing information.
- Decision Making: Depending the pulse received it should be decided that the received pulse is on or off.
