Celebrating the 20^ th anniversary of Optics Express, this paper reviews the evolution of
optical fiber communication systems, and through a look at the previous 20 years attempts to …

Photonics‐based microwave frequency mixing provides distinct features in terms of wide
frequency coverage, broad instantaneous bandwidth, small frequency‐dependent loss, and …

The ability to amplify optical signals is of pivotal importance across science and technology
typically using rare-earth-doped fibres or gain media based on III–V semiconductors. A …

Strong amplification in integrated photonics is one of the most desired optical functionalities
for computing, communications, sensing, and quantum information processing …

The ability to process optical signals without passing into the electrical domain has always
attracted the attention of the research community. Processing photons by photons unfolds …

An ideal amplifier has very low noise, operates over a broad frequency range, and has large
dynamic range. Unfortunately, it is difficult to obtain all of these characteristics …

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

Solving combinatorial optimization problems is becoming increasingly important in modern
society, where the analysis and optimization of unprecedentedly complex systems are …

Kerr nonlinearity imposes a limit on the achievable transmission performance and capacity
of optical fibre communication links. We show that the nonlinear distortions of a pair of phase …

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 …