Simple Eye Closure Penalty Estimate for Amplitude Noise-Degraded Signals

The increase of the capacity of communication systems can be achieved by an increase in the channel bit-rate. Increasing the channel rate assumes the utilization of shorter carrier pulses. It is well known that the propagation of short pulses is strongly affected by the fibre dispersion, which results in large temporal broadening of the carrier pulses. Subsequently, the carrier pulse power spreads over many time slots and so the accumulated effect of the instantaneous fibre nonlinearity tends to get averaged out. Signal transmission using short pulses is known as the pseudo-linear regime