We present a new suppression technique of the transmission impairments caus
ed by cross-phase modulation in dispersion-managed links. This technique ca
n be implemented through a simple, passive, and integratable device. Experi
mental results show a sensitivity penalty reduction from 4.3 to 0.1 dB in a
two-channel 10-Gb/s transmission over three spans of 100-km positive nonze
ro dispersion-shifted fiber. We also show numerically the potential merits
of the device with a large number of channels, merits which are expected to
become more evident with the number of spans.