Persistence of spectral variations in DGD statistics.

We observe distinct variations between the DGD temporal statistics for different channels in a field installed system. This phenomenon is confirmed with statistical analysis, using a model in which DGD dynamics are due only to a finite number of active points along the link.

Characterization of the time dependence of polarization mode dispersion.

We elaborate on a recently proposed model of the temporal dependence of polarization mode dispersion in long fiber links. We evaluate the probability that a channel of a wavelength-division multiplexed system never incurs an outage, and the range of frequency over which the parameters that characterize the temporal statistics of the differential group delay are correlated.