Photonic RF and microwave temporal signal processing based on optical
Kerr micro-combs
Abstract
Integrated Kerr micro-combs are a powerful source of multiple wavelength
channels for photonic radio frequency (RF) and microwave signal
processing, particularly for transversal filter systems. They offer
significant advantages featuring a compact device footprint, high
versatility, large numbers of wavelengths, and wide Nyquist bands. We
review progress photonic RF and microwave high bandwidth temporal signal
processing based on Kerr micro-combs with comb spacings from 49GHz to
200GHz. We focus on integral and fractional Hilbert transforms,
differentiators as well as integrators. The future potential of optical
micro-combs for RF photonic applications in terms of functionality and
ability to realize integrated solutions is also discussed.