Fig. 2: Principle of turnkey Brillouin-DKS generation.
From: Turnkey photonic flywheel in a microresonator-filtered laser
a The DKS attractor is defined by the intersection of thermally stable regime (dashed box) and SBL-detuning controlled DKS regime where the soliton number is color-coded. Of note, the microresonator temperature (MRT) changes the offset frequency between pump and Brillouin mode resonances, and consequently, MRT is an effective control parameter that determines the DKS attractor. Left inset: at the final stable DKS state (indicated by the yellow star), pump is blue detuned while SBL is red detuned. The black dashed line represents the Brillouin gain spectrum. Right inset: at an intermediate unstable state, both pump and SBL are red detuned. Evolution of b pump frequency shift, c comb power and d pump PDH signal during the turn-on process. PDH signal > 0: blue detuning, PDH signal < 0: red detuning, PDH signal = 0: zero detuning (resonance peak).
