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

Optical amplifiers are essential in numerous photonic applications. Parametric amplifiers,
relying on a nonlinear material to create amplification, are uniquely promising as they can …

In principle, optical phase-sensitive amplifiers are known to be capable of realizing
noiseless amplification, as well as improving the signal-to-noise-ratio of optical links by 3 dB …

One of the main reasons why nonlinear-optical signal processing (regeneration, logic, etc.)
has not yet become a practical alternative to electronic processing is that the all-optical …

This tutorial highlights challenges and opportunities in achieving efficient flexible optical
networks. Optical signal processing may potentially increase network flexibility because of …

Practical applications of all-optical regeneration require from it a graceful scalability with the
number of wavelength-division-multiplexed (WDM) channels. We describe several main …

The capacity and reach of long-haul fiber optical communication systems is limited by in-line
amplifier noise and fiber nonlinearities. Phase-sensitive amplifiers add 6 dB less noise than …

Optical parametric amplifiers rely on second-order susceptibility (three-wave mixing) or third-
order susceptibility (four-wave mixing) in a nonlinear process where the energy of incoming …

Frequency nondegenerate phase-sensitive amplifiers (PSAs) have the potential to realize
broadband and noiseless amplification. However, the rigorous requirement of phase-and …

We experimentally demonstrate, for the first time to our knowledge, a phase-sensitive
amplifier based on frequency nondegenerate parametric amplification in optical fiber, where …