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Absolute Frequency Measurement of Wavelength Standards

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Absolute Frequency Measurement of Wavelength Standards

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  • Author: Petr Balling, Benjamin Sprenger
These lasers are used for the realization of the SI definition of the meter according to method b) or c) of the Mise en Pratique. We have developed a program for online processing of the absolute frequency of the laser under investigation. The quality of the beat counting is tested by two counters with shifted band pass filters and its uncertainty is also evaluated online, together with Allan standard deviation, uncertainty and histograms.

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