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An ultrafast all-optical simultaneous wavelength and mode conversion scheme is purposed based on intermodal nonlinear wave mixing, with the capability of switching state of polarization and mode degeneracy orientation in few-mode fibers with high efficiency.
We proposed a PMD monitoring/compensation method in frequency domain for coherent system. With 15 ps of average DGD, the PMD induced penalty for 100-Gbit/s QPSK system is reduced by 9 dB at symbol-error-ratio of 10−3.
We studied the LO linewidth limitation for a 16-QAM WDM coherent system. The simulation shows that the linewidth should be less than 500 KHz for ≥ 100 Gb/s over 300 km dispersion managed fiber link.
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