Nobel Lecture: Passion for precision*

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Mid-infrared dual-comb spectroscopy with 2.4 μm Cr2+:ZnSe femtosecond lasers (2010, background): “Introduced in the late 1990s, laser frequency combs have revolutionized [1,2] precise measurements of frequency and time.”
Highly charged ions: Optical clocks and applications in fundamental physics (2018, background): “Science based on frequency metrology experienced a tremendous boost with the development of optical frequency combs which enabled the counting and comparison of optical frequencies (Hall, 2006; Hänsch, 2006).”
Cavity-enhanced direct frequency comb spectroscopy (2008, background): “An optical frequency comb (OFC) [1–8] can be defined in the frequency domain as a series of narrow, equally spaced lines with a known, and controllable, optical frequency and a well-defined phase relationship between them.”
Rapid and precise absolute distance measurements at long range (2009, background): “Femtosecond optical frequency combs offer an intriguing solution to the intrasatellite ranging proble”
New frontiers for quantum gases of polar molecules (2016, background): “c, Because of their many degrees of freedom, polar molecules can be used for a variety of precision measurement applications [102], including tests for parity and CP violation [103] and time variation of fundamental constants such as the fine structure constant (for which electronic transitions are ”