Technique reveals colors and intensity of all lightwaves simultaneously

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False-color images of the fingerprints of molecular iodine each taken under different experimental conditions using a NIST frequency brush created with an ultrafast visible laser. The squares within each frame reveal the frequency and intensity of li ...
False-color images of the "fingerprints" of molecular iodine, each taken under different experimental conditions using a NIST frequency brush created with an ultrafast visible laser. The squares within each frame reveal the frequency and intensity of light from individual "bristles" of the brush. The variation in the colors reveal where the iodine absorbs specific optical frequencies. Credit: S. Diddams/NIST

Physicists at the Commerce Department's National Institute of Standards and Technology have taken the first ever two-dimensional pictures of a "frequency comb," providing extra information that enhances the comb's usefulness in optical atomic clocks, secure high-bandwidth communications, real-time chemical analysis, remote sensing, and the ultimate in precision control of atoms and molecules.


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