Microresonator-based optical frequency combs have been under extensive research during the last years. However, the actual comb generation processes are still far from being understood. Different theoretical models have been proposed, however, recent results indicate that there can be different and completely independent comb generation mechanisms, which depend on the microresonator mode spectrum and dispersion. Here, we present frequency domain analysis of the transition of microcombs into phase locked states. We show the existence of equidistant optical frequency combs that are phase stable but with non-deterministic phase relationships between individual comb modes.
Citation: Physical Review Letters
Pub Type: Journals
Auto-Correlation, Fused Silica, Injection-Locking, Kerr-Effect, Microresonator, Microrod, Nonlinear Optics, Optical Frequency Comb, Phase Control, Waveshaping