Narrow-linewidth lasers and optical frequency combs generated with mode-locked lasers have revolutionized optical frequency metrology. The advent of soliton Kerr frequency combs in compact crystalline or integrated ring optical microresonators has opened new horizons in academic research and industrial applications. These combs, as was naturally assumed, however, require narrow-linewidth, single-frequency pump lasers. We demonstrate that an ordinary cost-effective broadband Fabry–Pérot laser diode at the hundreds of milliwatts level, self-injection-locked to a microresonator, can be efficiently transformed to a powerful single-frequency, ultra-narrow-linewidth light source with further transformation to a coherent soliton comb oscillator. Our findings pave the way to the most compact and inexpensive highly coherent lasers, frequency comb sources, and comb-based devices for mass production.

窄线宽激光器和锁模激光器产生的光频率梳彻底改变了光频率计量学。紧凑型晶体或集成环形光学微谐振器中孤子Kerr频率梳的出现为学术研究和工业应用开辟了新的视野。但是，正如自然假定的那样，这些梳子需要窄线宽的单频泵浦激光器。我们证明，自注入锁定在微谐振器上的数百兆瓦级的普通低成本Fabry-Pérot宽带激光二极管可以有效地转换为功能强大的单频，超窄线宽光源，并具有进一步的应用价值。转换为相干孤子梳状振荡器。我们的发现为最紧凑，最便宜的高相干激光器，频率梳光源，