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Ongoing BIPM comparisons in length
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    • On-site laser comparisons:

      BIPM.L-K10 – Comparison of the frequencies of helium-neon lasers at wavelength 633 nm

    • Absolute frequency measurements:

      BIPM.L-K11 – Comparison of primary wavelength standards
    Related articles

    Summary chart of BIPM services in the field of time, frequency and gravimetry
    Further information on the Time Department
         
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