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400 Gbit/s Frequency-Division-Multiplexed and Polarization-Multiplexed 256 QAM-OFDM Transmission over 400 km with a Spectral Efficiency of 14 bit/s/Hz

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Abstract

We demonstrate a 400-Gbit/s frequency-division-multiplexed and polarization- multiplexed OFDM transmission over 400 km (5×80 km SSMF) with 256 QAM subcarrier modulation using an optical PLL. A record spectral efficiency of 14 bit/s/Hz was successfully achieved.

© 2012 Optical Society of America

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