Mode-locked dark pulse Kerr combs in normal-dispersion microresonators

Xiaoxiao Xue, Yi Xuan, Yang Liu, Pei Hsun Wang, Steven Chen, Jian Wang, Dan E. Leaird, Minghao Qi, Andrew M. Weiner

Research output: Contribution to journalArticlepeer-review

499 Scopus citations


The generation of Kerr frequency combs in a coherently driven nonlinear microresonator is now extensively investigated more generally by the research community as a potentially portable technology for a variety of applications. Here, we report experiments in which dark pulse combs are formed in normal-dispersion microresonators with mode-interaction-assisted excitation, and mode-locking transitions are observed in the normal-dispersion regime. The mode-interaction-aided excitation of dark pulses appears to occur through a deterministic pathway, in sharp contrast to the situation for bright pulses in the anomalous dispersion region. The ability to mode-lock in the normal-dispersion regime increases the freedom in the microresonator design and may make it possible to extend Kerr comb generation into the visible, where material dispersion is likely to dominate.

Original languageEnglish
Pages (from-to)594-600
Number of pages7
JournalNature Photonics
Issue number9
StatePublished - 28 Sep 2015


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