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Progress and feasibility for a unified standard for frequency, time, and length

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3 Author(s)

The recent successful extension of frequency synthesis upward in the infrared to the 88-THz frequency of the very stable methane frequency standard has implications for expanded uses of frequency/time metrology and hence of frequency/time dissemination systems. After further refinements of the infrared frequency synthesis techniques, metrologists will have the opportunity to define a value for the speed of light and to use a particular frequency standard --the most accurate one--as a unified standard for frequency, time, and length.

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Proceedings of the IEEE  (Volume:60 ,  Issue: 5 )