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We have experimentally demonstrated C-band 112-Gb/s (4×28-Gb/s) PAM-4 transmission over 160-km SMF without inline amplifier based on 10G-class DML and photodiode. Delay interferometer and Volterra filtering are applied to compensate both linear and nonlinear distortions.
Single-channel 112-Gb/s PAM-4 transmission based on low-cost intensity modulation and direct detection (IM/DD) optics is experimentally demonstrated over 1-km standard single-mode fiber. By employing a digital precompensation, duobinary encode/decoding with PAM-4 signal and 7-level training-sequence-aided least mean square (TS-LMS) algorithm, we successfully achieve a receiver sensitivity of about...
We propose a fading-free direct detection method for transmission of complex-value OFDM signal in metro distances. By using two orthogonal optical carriers, an 82-Gb/s dual-band transmission is demonstrated over 320-km SSMF within only 30-GHz electrical bandwidth.
We propose a novel guard-band-shared direct detection scheme to improve the receiver spectrum efficiency. A 100-Gb/s DDO-OFDM/OQAM signal transmission has been successfully demonstrated over 80-km SSMF using a single photodiode within 50-GHz optical grid.
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