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Fiber optic communication systems are limited by effects arising from chromatic dispersion and nonlinearities. In this paper, evaluations of nonlinear effects like SPM and XPM are made, in order to determine the limits imposed by these effects on the launched power. These evaluations are done by means of simulation scenarios, where single channel 10Gb/s DPSK optical modulation with direct detection is employed over 100 km of SMF. In addition, the benefits of SPM are shown by applying this effect in an all-optical regeneration scheme, used to compensate residual dispersion over 500 km of SMF. [ABSTRACT FROM PUBLISHER]

The development of technologies for optical access networks and user demand for more bandwidth has enabled consider increasing rates and improve the current coverage of access networks. Currently there are various ways to achieve this goal, one relates to the use of modulations in the signal processing in both the OLT and the ONU. This process has already begun studying for transport networks with highly complex formats and costly implementation. DPSK (Diferencial Phase Shift Key) modulation has been identified for possible implementation in the context of access. This paper describes how we implement to 10Gpbs and testing with 2 different types of fibers. [ABSTRACT FROM PUBLISHER]