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Third-order non-linearity reduction in a bidirectional CATV/RoF hybrid transmission system using incoherent light injection and RF amplifier pre-distortion

Third-order non-linearity reduction in a bidirectional CATV/RoF hybrid transmission system using incoherent light injection and RF amplifier pre-distortion

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We propose and experimentally demonstrate a bidirectional Community Antenna Television/radio-over-fibre (RoF) hybrid transmission system based on incoherent light injection and RF amplifier pre-distortion to reduce third-order non-linearity. At downlink, 10-Gbps/30-GHz data and 79 CATV channels are transmitted over 50 km single-mode fibre (SMF), and at uplink 5-Gbps/15-GHz data and CATV signals are successfully transmitted concurrently over 50 km through the same SMF. The authors have found low bit-error rate (BER) and clear eye diagrams for the RoF data signals, and obtained outstanding transmission performance in terms of carrier-to-noise ratio, composite second order, and composite triple-beat for the CATV signals in downlink and uplink transmission.

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