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PMD compensation for 40 Gb/s Apol RZ-DPSK is successfully demonstrated using different feedback methods. Eye-opening feedback exhibits the lowest penalty. Experiments indicate a mean PMD tolerance of 5.3 ps for an outage probability of 10-5.
We present simulations of a novel electronic signal processing technique that allows digital equalization of optical 40 Gbit/s DQPSK signals using iterative equlization with mutual exchange of information between low complexity MLSEs.
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