The role of Q-factor and of time jitter in the evaluation of the system performance has been
investigated for return-to-zero (RZ) optically amplified links. We show that, also if the …

A new method for the semi-analytical estimation of the bit-error rate (BER) of digital optical
systems is presented. It is based on system simulation and accurately considers the …

The bit-error rate (BER) of a simulated PCM-ASK heterodyne-type optical communication
system was measured for the first time as a function of the received signal power, to verify …

High-speed, photonically amplified digital links have their performance limited by a complex
combination of intersymbol interference, laser nonlinearities, and signal-dependent noise …

The 'Q'parameter is currently the favoured metric for evaluating the performance of long
span optically amplified systems. Q measurements have proved to be unreliable when …

The relationship between Q penalty (QP) and eye-closure penalty (ECP) is examined for
distorted signals in the presence of signal-dependent noise. A simple model is developed to …

The results of a detailed study of the performance of 40-Gbit/s optical transmission over
standard single-mode fiber with alternate-phase return-to-zero (AP-RZ) modulation formats …

We present an accurate method for the Q-factor estimation even in the presence of
waveform distortions in optically amplified systems. The method stands on the assumption …

We derive an explicit relationship between the Q factor and the optical signal-to-noise ratio
in optical fiber transmission systems for an arbitrary pulse shape using an accurate receiver …

A novel analytical method to evaluate the bit-error rate in optical links where the amplified
spontaneous emission (ASE) noise at the receiver is a nonwhite random process is …