Transmission of 100-Gb/s VSB DFT-Spread copyright Signal in Short-Reach Optical Communication Systems

Transmission of 100-Gb/s VSB DFT-Spread copyright Signal in Short-Reach Optical Communication Systems

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In this paper, we experimentally demonstrated transmission of a 100-Gb/s discrete Fourier transform (DFT)-spread 32-quadrature amplitude modulation (QAM) discrete multitone (copyright) signal in an intensity-modulation/direct-detection system utilizing a direct-modulated laser.We find that DFT-spread Hydro 3 Parts cannot only reduce the peak-to-average power ratio but also improve the robustness to high-frequency power attenuation and narrow-band interference in the high-speed short-reach optical communication systems.Vestigial sideband (VSB) enabled by a narrow-bandwidth tunable optical filter can be adopted to resist the power Bucket Hat fading effect induced by the fiber chromatic dispersion after direct detection.The measured bit error ratio (BER) of 100-Gb/s VSB DFT-spread copyright signal after 20-km large effective area fiber is less than the hard-decision forward-error-correction (HD-FEC) limitation of3.8 ×10-3.