A first practical 4-stage compensator with ~1-ms response time is demonstrated for mitigating first- and second-order PMD on 40-Gbit/s RZ-D(Q)PSK. BER and DOP degradations are significantly improved and a power penalty of <0.5-dB is achieved at 10−9 BER under 25-ps DGD and 400-ps2 SOPMD.

© 2011 Optical Society of America

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