Verfahren zur Kompensation der Dispersion in einem optischen Übertragungsmedium

摘要

An electric baseband signal (IN) is divided between two parallel transmission circuits each incorporating a low-pass filter (LPF) between input and output modulators (M1,M2;MA,MB). An electric carrier frequency (fo) is inserted at the input, with 90 deg. phase shift (PSE) between the parallel circuits, and an optical carrier frequency (Fo) is inserted (To) with similar phase shift (PSO) for the output. The two optically modulated signals are added (ADD). The output modulators may be Mach-Zehnder interferometers.