 ![(Color online) Allan Deviation values (corresponding to lasing linewidth in [$\,\mathrm{Hz}$]{}) and relative stabilities (corresponding to lasing $Q$ factor) for the whispering gallery lasers (WGL). (a) Direct evaluation of the beat note signal between WGL0 and WGL0 reports the combination of both noise sources. (b) Individual noise components were obtained via the three-cornered hat method, a possible correlation was taken into account.[]{data-label="fig:allan_0ch"}](