Optical frequency combs are broadband sources that offer mutually-coherent, equidistant spectral lines with unprecedented precision in frequency and timing for an array of applications. Kerr frequency combs in microresonators require a single-frequency pump laser and have offered the promise of highly compact, scalable, and power efficient devices. Here, we realize this promise by demonstrating the first fully integrated Kerr frequency comb source through use of extremely low-loss silicon nitride waveguides that form both the microresonator and an integrated laser cavity. Our device generates low-noise soliton-modelocked combs spanning over 100 nm using only 98 mW of electrical pump power. Our design is based on a novel dual-cavity configuration that demonstrates the flexibility afforded by full integration. The realization of a fully integrated Kerr comb source with ultra-low power consumption brings the possibility of highly portable and robust frequency and timing references, sensors, and signal sources. It also enables new tools to investigate the dynamics of comb and soliton generation through close chip-based integration of microresonators and lasers.

中文翻译：

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电池供电的集成频率梳发生器

光频梳是宽带源，可为一系列应用提供具有前所未有的频率和定时精度的相互相干、等距谱线。微谐振器中的克尔频率梳需要单频泵浦激光器，并有望提供高度紧凑、可扩展和高能效的设备。在这里，我们通过使用形成微谐振器和集成激光腔的极低损耗氮化硅波导展示了第一个完全集成的克尔频率梳源，从而实现了这一承诺。我们的设备仅使用 98 mW 的电泵功率即可生成跨越 100 nm 的低噪声孤子锁模梳。我们的设计基于一种新颖的双腔配置，展示了完全集成所提供的灵活性。具有超低功耗的完全集成的克尔梳状源的实现带来了高度便携和强大的频率和定时参考、传感器和信号源的可能性。它还使新工具能够通过微谐振器和激光器的基于芯片的紧密集成来研究梳状和孤子产生的动力学。