The prospects for using fiber optical parametric amplifiers (OPAs) in optical communication
systems are reviewed. Phase‐insensitive amplifiers (PIAs) and phase‐sensitive amplifiers …

Optical data regeneration is attractive, due to its potential to increase transmission reach and
data throughput in communication systems, and several interesting proposals have been …

We propose and experimentally demonstrate a phase-sensitive optical processor, capable
of generating two codirectional and π-phase-shifted phase-sensitive amplifiers (PSAs) in a …

We propose and demonstrate simultaneous phase regeneration of six nonreturn-to-zero
binary phase shift keying signals in a single nonlinear medium. The regenerating system …

We propose and demonstrate a new phase-sensitive (PS) scheme based on four-wave
mixing followed by a polarizer to achieve an ideal binary step-like phase transfer function at …

We develop an analytical model to describe propagation of seven continuous waves [two
strong pumps, a degenerate signal and idler, two high-order idlers (HOIs), and two high …

We present a new method to perform phase regeneration of phase encoded signals. In our
concept called “hybrid optical phase squeezer (HOPS),” a multilevel phase-quantized signal …

Phase-sensitive amplification (PSA) based on nonlinear parametric interaction provides low-
noise amplification such that the noise figure can be 0 dB in principle. However, when an …

We present a thorough investigation aimed at the optimization of a phase-sensitive optical
parametric amplifier capable of simultaneous phase and amplitude regeneration. The …

In this chapter we review the need, general principles and approaches used to regenerate
mainly phase encoded signals of differing levels of coding complexity. We will describe the …