We report on the first, to the best of our knowledge, frequency ratio measurement of an singleion clock and a optical lattice clock. A hydrogen maser serves as a flywheel oscillator to measure the ratio by independent optical combs. From 89,000 s of measurement time, the frequency ratio / is determined to be 2.952 748 749 874 863 3(23) with 7.7×10 relative uncertainty. The measurement creates a new connection in the network of frequency ratios of optical clocks.
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| http://dx.doi.org/10.1364/OL.404940 | DOI Listing |
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