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December 2, 2015 at 9:46 am
#28320
Great! In a simulation it can, but realistically of course there is always a source of distortion or noise. There can be distortion from the modulators which will give an unevenly spaced constellation because of the non-linearity of the mach zehnder modulators. There can also be noise introduced by the PIN photo-diodes at the receiver side etc..