As the signal propagates through a fiber optical communication system it suffers from attenuation and dispersion. Attenuation determines the repeater less separation between a transmitter and a receiver, while dispersion causes the signal pulses to broaden as they travel along the fiber. In other words attenuation is the process of weakening of a signal as it propagates through a fiber and dispersion limits the information carrying capacity. Either repeaters or optical amplifiers may compensate these losses. Due to pulse broadening two neighboring pulses interfere with each other and...