Figure 5
From: A low-phase-noise 18 GHz Kerr frequency microcomb phase-locked over 65 THz
Allan deviation of the free-running (open squares) and the stabilized (closed squares) Kerr frequency comb spacing.
In free running mode, the comb spacing stability is limited by the fluctuation resulting from the pump laser wavelength drift (red diamond). Feedback stabilization is achieved by monitoring the comb spacing and controlling the pump laser wavelength to compensate the errors with a proportional-integral controller. Inset: The comb spacing as a function of the pump wavelength detuning, determined at 57 Hz/MHz in our microresonator.
