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We use a recirculating fibre loop setup to determine the probability density function of sampled bits in long links under linear and nonlinear propagation conditions. Our measurements confirm a recent theoretical simplified model.
We experimentally investigate the probability density function (pdf) of sampled bits in common intensity-modulated direct-detection systems in linear and nonlinear regime, both single-channel and wavelength-division-multiplexed. To this aim, we use a recirculating fiber loop and selectively obtain the sample pdf for the various bits in a given sequence, which allows separating the intersymbol interference...
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