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We experimentally demonstrate a 429.96-Gb/s signal transmission over a 400-km standard single-mode fiber within the 50-GHz grid and successfully achieve spectral efficiency as high as 8.63 bit/s/Hz. Orthogonal frequency-division multiplexing/offset quadrature amplitude modulation with 64-quadrature amplitude modulation is selected as the modulation format to provide a “perfect” rectangular spectrum...
We experimentally demonstrated a 429.96-Gb/s OFDM/OQAM-64QAM transmission over 400-km standard single mode fiber on the 50 GHz ITU-T grid. The spectral efficiency is as high as 8.63 bit/s/Hz.
Without using polarization multiplexing, 114-Gbit/s D8PSK for 50-GHz WDM grid has been successfully demonstrated and transmitted over SSMF of 500 km. For each WDM channel, 2 subcarriers with D8PSK modulation are employed to enhance the dispersion tolerance.
We demonstrate a novel in-line chromatic dispersion monitoring scheme for 100 Gbit/s RZ-DQPSK signal based on delay tap sampling and asymmetry ratio evaluation. This scheme can differentiate positive and negative residual chromatic dispersion.
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