Photonic Synthesis of Mm-wave and THz Signals for 5G and Beyond

Low phase noise mm-wave oscillators are critical components for the implementation of emerging 5G and future 6G communication systems, both terrestrial and space-based. As carrier frequencies move into the V-band, W-band, D-band and the THz range, photonic synthesis of signals becomes more attractive, especially from the perspective of phase noise. Here, we review recent work in this field, with the focus on self-oscillating topologies derived from the optoelectronic oscillator.