Extended Data Fig. 3: Linear drift decay of SBS resonator.
From: Operation of an optical atomic clock with a Brillouin laser subsystem

Record of the SBS laser’s linear drift at 1,348 nm for two resonators. The first resonator (red circles) is tracked over 79 days, and its linear drift decreases to a value of 200 Hz s−1 at the end of the elapsed period of time. The second resonator (blue squares) is tracked over 260 days and reaches a minimum of 30 Hz s−1.