Chromatic dispersion measurements of 4564 km optical amplifier repeater system

Abstract

Chromatic dispersion measurement is demonstrated on a 4564 km transmission system with 138 cascaded optical amplifiers. The technique uses a phase error cancellation method, which significantly reduces the phase error due to the system length fluctuations. It also uses temperature tuned DFB-LDs, which provide precise and stable probe wavelength control over a few nanometres.