Abstract
Summary form only given. In WDM optical communication systems, nonlinear effects in optical fibers can lead to crosstalk between channels . It has been reported that cross phase modulation (XPM) induced by residual intensity modulation causes penalty in multi-channel PSK and FSK systems. Previously we have shown that chromatic dispersion has a significant impact on the magnitude of XPM in a single segment of fiber. In this paper, we investigate experimentally and theoretically XPM in systems where multiple optical amplifiers are used as repeaters.
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