We demonstrate the simultaneous radio-over-fiber feed of 16-QAM 10-Gb/s CAP and 1-GHz OFDM radio at 28-GHz for HetNets. Independent sideband modulation yields photonic up-conversion to the mm-wave band and a dispersion-tolerant feed over 70km.

We demonstrate RF beamsteering through cascaded Gires-Tournois etalons, yielding a delay-tailored DWDM feed for a 2×5 antenna configuration. 64-QAM OFDM radio is transmitted under 32° beam deflection. We further show kHz carrier phase switching. © 2022 The Author(s)

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We demonstrate a simplified out-door FSO link with modal split for down-/uplink and confirm its long-term stability without active beam tracking. We further prove the duality of modal and directional split through penalty-free full-duplex transmission.