Abstract

In long-haul, optically amplified communication systems, the effect of chromatic dispersion can be very critical. To avoid waveform distortion the signal wavelength should be very close to the zero-dispersion wavelength of the total transmission fiber. On the other hand, in order to reduce the transmission penalty induced by four-wave mixing (FWM), the signal wavelength should be located away from the dispersion zero of individual fiber spans. To satisfy the above requirements the transmission fiber should be constructed of a mixture of normal (negative) dispersion and anomalous (positive) dispersion fiber spans. In this case-depending on the signal power and the fiber location, the performance of the system can also be limited by modulation instability (MI) in the anomalous-dispersion fiber.1 Here we present a summary of an ongoing experimental investigation into the effect of local dispersion management in long-haul fiber optic communication systems.

© 1995 Optical Society of America

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