Abstract
A 10 Gbps full-duplex 40 GHz radio-over-fiber (RoF) communication system is presented in this paper. A 5 GHz input Radio Frequency signal is octupled to 40 GHz using cascaded parallel Mach–Zehnder modulators (MZMs) operating at lower modulation index (m) range of 2.5–3.5. The ROF transmission system employs symmetrical inline dispersion compensation technique using tDCF and frequency re-use concept for upstream transmission. Full-duplex transmission distance of 180 kms can be achieved with quality factor (Q) ≥ 7 for wide range of modulation index (2.5–3.5) of MZMs, reflecting that system is tolerant to biasing variations. The transmission length can be increased to 210 kms for relatively reduced modulation index range of 3.2–3.5.
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