We investigate theoretically and experimentally\udthe detrimental e ect of ber dispersion on the synchroniza-\udtion of an optoelectronic phase chaos cryptosystem. We\udevaluate the root-mean square synchronization error and\udthe cancellation spectra between the emitter and the re-\udceiver in order to characterize the quality of the optical\ud ber communication link. These two indicators explicitly\udshow in temporal and spectral domain how ber dispersion\uddoes negatively a ect the phase chaos cancellation at the re-\udceiver stage. We demonstrate that the dispersion manage-\udment techniques used in conventional optical ber networks,\udsuch as dispersion-compensating modules/ bers or disper-\udsion shifted bers, are also e cient to strongly reduce the\uddetrimental e ects of ber propagation in phase chaos com-\udmunications. This compatibility therefore opens the way to\uda successful integration of more than 10-Gb/s phase chaos\udcommunications systems in existing networks, even when\udthe ber link spans over more than 100 km.
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