A perspective on optical microcomb distillation: A tool to break power barriers for tiny rainbows

Optical microcombs are compact photonic-chip-based devices able to produce precise optical frequency combs. However, these combs are often limited in power, which can provide issues for implementation, especially for optical communications. Here, we provide our perspective on the use of a suite of techniques and technologies we call "comb distillation," to help enable high-power, low-noise microcombs.