The performance of a one-stage polarization-mode dispersion (PMD) compensator with different feedback signals is studied and compared with that of a pure first-order PMD compensator. We show that the performance of the one-stage PMD compensator has a strong dependence on feedback signals, and that the efficiency of some feedback signals depends on modulation formats. With proper choice of feedback signals, the one-stage PMD compensator can achieve better performance than the first-order PMD compensator.
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Xie et al. (2005) studied this question.
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