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An approach for multiple-frequency millimeter-wave (mm-wave) signal generation is proposed for radio-over-fiber (RoF) systems with multiple base stations (MBSs). Two groups of orthogonally polarized pumps are injected into a semiconductor optical amplifier (SOA), and subsequently, ten new different wavelengths are generated via four-wave mixing (FWM). At the BSs, different wavelengths are filtered...
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