Optical — Frequency Comb

: Used to calibrate spectrographs on telescopes to detect tiny wobbles in distant stars, helping find Earth-like exoplanets .

Frequency combs bridge the gap between easy-to-measure radio frequencies and incredibly fast optical light waves. optical frequency comb

: They act as "gears" that take the incredibly fast ticks of optical atoms and divide them down to manageable microwave frequencies used in electronics. : Used to calibrate spectrographs on telescopes to