image: Artist's impression of the laser comb developed for astronomy. Such a laser comb is necessary to act as a "ruler" for calibrating the new, extremely precise spectrographs that will be needed in ...

(Nanowerk News) Just as a meter stick with hundreds of tick marks can be used to measure distances with great precision, a device known as a laser frequency comb, with its hundreds of evenly spaced, ...

Frequency combs are specialized lasers that generate evenly spaced-out lines of light akin to the teeth of a comb or, more aptly, the tick marks on a ruler. In the roughly quarter-century of their ...