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Second-order PMD has been successfully mitigated for 80-Gbit/s RZ-DQPSK signals by an all-optical regenerator based on optical parametric amplification. System performance comparison has been made for a conventional polarizer-based PMD compensator.
Simultaneous PMD mitigation by optically clocked reshaper for two-channel 80-Gbit/s RZ-DQPSK signals has been demonstrated using gain saturation effects of optical parametric amplification. The reshaper was applied to mitigate DGD as high as 100 ps.
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