The 2005 Nobel Prize in Physics awarded to Theodor W. Hänsch

Ted Hänsch and Marco Bellini performed one of the key experiments leading to the invention of the femtosecond frequency comb (and, later, to the Nobel prize) in Florence.

In 1997, we demonstrated the coherence in the process of supercontinuum generation that was the starting point to conceive the possibility of generating ultra-broadband self-calibrating optical frequency combs.

The experiment showing high-contrast white-light interference fringes