Abstract
We investigate theoretically and experimentally the detrimental effect of
fiber dispersion on the synchronization of an optoelectronic phase chaos
cryptosystem. We evaluate the root-mean square synchronization error and the
cancellation spectra between the emitter and the receiver in order to
characterize the quality of the optical fiber communication link. These two
indicators explicitly show in temporal and spectral domain how fiber
dispersion does negatively affect the phase chaos cancellation at the
receiver stage. We demonstrate that the dispersion management techniques
used in conventional optical fiber networks, such as dispersion-compensating
modules/fibers or dispersion shifted fibers, are also efficient to strongly
reduce the detrimental effects of fiber propagation in phase chaos
communications. This compatibility therefore opens the way to a successful
integration of more than 10-Gb/s phase chaos communications systems in
existing networks, even when the fiber link spans over more than 100
km.
© 2010 IEEE
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