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Laser-phase-fluctuation-insensitive optical coherent detection scheme with two-tone local light and digital signal processing technique for a radio-over-fiber (RoF) signal is proposed and experimentally demonstrated. Data recovery with the error vector magnitude of less than 14% rms is successfully performed for 10- and 2.5-Gbaud 25-GHz-band QPSK RoF signals. In addition, bit error rate of less than...
A digital-signal-processing-assisted optical coherent detection of an uplink radio-over-fiber signal with a two-tone local light, which is insensitive to laser phase noises, is newly proposed and its phase noise cancellation effect is experimentally demonstrated.
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