All-optical regeneration

Abstract
Different optical signal regeneration techniques are reviewed. Fibre or semiconductor based devices are addressed and compared, and 2R or 3R schemes are discussed. We briefly review 2R (reshaping repeater) and 3R (retiming reshaping repeater) optical regeneration schemes, based on different technologies which could be promising for high speed optical signal processing, and also try to compare these new optical approaches with well known optoelectronic schemes.