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Hamamatsu Corp. - Earth Innovations LB 2/24

Chip-Scale Atomic Clock Refined

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At the National Institute of Standards and Technology in Boulder, Colo., researchers have developed a 12-mm3 atomic clock based on the D1 line in rubidium-87 that may find applications in mobile communications and navigation systems. The instrument, which they describe in the Feb. 21 issue of Optics Express, displays superior short- and long-term stability compared with their first, recently reported clock, which was based on the D2 transition in cesium. The clock features a 1-mm3 cell filled with rubidium vapor, into which heating elements, an optics assembly, a near-IR vertical-cavity...Read full article

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    Published: March 2005
    Glossary
    atomic clock
    An atomic clock is a highly precise timekeeping device that uses the vibrations or oscillations of atoms as a reference for measuring time. The most common type of atomic clock uses the vibrations of atoms, typically cesium or rubidium atoms, to define the length of a second. The principle behind atomic clocks is based on the fundamental properties of atoms, which oscillate at extremely stable and predictable frequencies. The primary concept employed in atomic clocks is the phenomenon of...
    As We Go To Pressatomic clockBasic ScienceBreaking NewsCommunicationsConsumermobile communicationsNational Institute of Standards and TechnologyPresstime BulletinSensors & Detectors

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