The dual-comb approach (also called multiheterodyne approach) that is used in dual-comb spectroscopy1,2 allows for fast and precise scans over a broad frequency (or wavelength) range without any moving parts. While this technique can of course be used for spectroscopy3–5 it has by now found many more applications where it can replace scanning lasers and conventional broad-band light sources and optics. Examples are distance measurements (lidar)6 and rapid spatial scanning for imaging7,19. Here we will look into a few aspects of dual-comb schemes and why Kerr frequency combs are a very suitable light source.
After being reminded of this cartoon by Pascal Del’Haye, I could not find a proper version of it on the internet. So I asked the author directly and here it is with some digital polishing applied: the curiosity driven research, chicken-and-chick cartoon by Theodor Haensch.
Peer reviewing is a crucial part of science today but it is also much debated. The perfect system does probably not exist but the current system can certainly be improved. One way to do so might be published peer reviews that have gotten some attention lately. Published reviews means that the written reviews of the paper and the replies of the authors are published alongside the paper. Nature Communications has had this option for a few years now and some Kerr frequency comb papers have published peer reviews: