Abstract
In this paper, we review our recent research progresses on real-time orthogonal frequency division multiplexing (OFDM) transmission and reception. We successfully realized the transmission and reception of real-time 100Gbps dual optical carrier 16-ary quadrature amplitude modulation (16QAM)-OFDM with direct detection for ultra-short fiber transmission. And we also successfully demonstrated the transmission and reception of real-time 100Gbps single-band coherent optical dual polarization (DP)-16QAM-OFDM signal for the first time with coherent detection. The measured bit error ratio (BER) for 100Gbps single-band coherent optical DP-16QAM-OFDM signal is less than 3.8×10<sup>-3</sup> after 200-km standard single mode fiber (SSMF) without electrical dispersion compensation (EDC).
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