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Updated: Jun 22, 2026

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Frequency measurement of a Sr lattice clock using an SI-second-referenced optical frequency comb linked by a global
Abstract:
We have established a transportable frequency measurement system using an optical frequency comb linked to a commercial Cs atomic clock, which is in turn linked to international atomic time (TAI) through global positioning system (GPS) time. An iodine-stabilized Nd:YAG laser is used as a flywheel in the frequency measurement system. This system is used to measure the absolute frequency of the clock transition of (87)Sr in an optical lattice. We obtained a fractional uncertainty of 2x10(-14) in the frequency measurement with a total averaging time of ~ 10(5) s over 9 days.
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