New on-chip laser frequency comb is 100 times more efficient than previous versions

https://phys.org/news/2022-09-on-chip-laser-frequency-efficient-previous.html

"combining these two approaches—the coupled resonator with the electro-optical frequency comb—we could improve the efficiency a lot without sacrificing bandwidth. In fact, we actually improved bandwidth... combines the process of electro-optic frequency comb generation with the more traditional approach of a Kerr frequency comb"