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EUV Frequency Comb Debuts

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BOULDER, Colo., Feb. 6, 2012 — The first “frequency comb” in the extreme- ultraviolet (EUV) band of the spectrum has the potential to advance nuclear clocks and to measure previously unexplored behavior in atoms and molecules. Laser-generated frequency combs are the most accurate method available for precisely measuring frequencies of light. Physicists from JILA — a joint venture of the National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder — performed experiments demonstrating a very fine mini-comb-like structure within each subunit, or harmonic, of...Read full article

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    Published: February 2012
    Glossary
    extreme ultraviolet
    Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum. EUV radiation has wavelengths between 10 and 124 nanometers, which corresponds to frequencies in the range of approximately 2.5 petahertz to 30 exahertz. This range is shorter in wavelength and higher in frequency compared to the far-ultraviolet and vacuum ultraviolet regions. Key points about EUV include: Source: EUV radiation is produced by extremely hot and energized...
    frequency comb
    A frequency comb is a precise and regular series of equally spaced spectral lines, or frequencies, that are generated with great accuracy. The term "frequency comb" is often associated with the Nobel Prize-winning technique known as frequency comb spectroscopy, developed by John L. Hall and Theodor W. Hänsch in the 1990s. The technology has since become a powerful tool in various scientific and technological applications. Key points about frequency combs: Origin and development: The...
    laser spectroscopy
    That part of the science involved in the study of the theory and interpretation of spectra that uses the unique characteristics of the laser as an integral part in the development of information for analysis. Raman spectroscopy and emission spectroscopy are two areas where lasers are used.
    plasma
    A gas made up of electrons and ions.
    Americasatom behaviorBasic ScienceColoradodefenseEUV frequency combextreme ultravioletfiber lasersfrequency combharmonicsImagingindustrialinfrared light pulsesJILAJun Yelaser spectroscopylaser-generated frequency combmolecule behaviorNational Institute of Standards and TechnologyNISTnuclear clockoptical cavityplasmaprecise measurement of frequencypulsed lasersResearch & TechnologyTest & Measurementultrafast pulsed lasersUniversity of Colorado at Boulderx-ray frequency combytterbium fiber lasersLasers

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