Remote Comparison of Two Sr Optical Lattice Clocks through a 58 km Fiber Link
Sign Up to like & getrecommendations! Published in 2025 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/42/3/034201
Abstract: Two 87Sr optical lattice clocks (OLCs) are being developed and operated at the National Institute of Metrology (NIM), located on different campuses that are 40 km apart. In order to compare the optical frequencies of… read more here.
Keywords: comparison; lattice clocks; optical lattice; remote comparison ... See more keywords
Intercontinental frequency ratio measurement of 171 Yb and 88 Sr optical lattice clocks
Sign Up to like & getrecommendations! Published in 2024 at "Metrologia"
DOI: 10.1088/1681-7575/ad6a1e
Abstract: We report a remote, intercontinental frequency comparison between 171Yb (NMIJ) and 88Sr (UMK) optical lattice clocks. The frequencies were compared via the Global Positioning System Precise Point Positioning technique over the period from 10 March… read more here.
Keywords: intercontinental frequency; lattice clocks; frequency ratio; optical lattice ... See more keywords
DBR Lasers at 679.29 and 707.20 nm for Efficient Repumping in Sr Optical Lattice Clocks
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DOI: 10.1109/lpt.2025.3591153
Abstract: We have developed and characterized DBR lasers emitting at 679 nm and 707 nm, specifically tailored to excite the repumping wavelengths in Sr optical lattice clocks. They achieve a FWHM linewidth of about 1MHz at… read more here.
Keywords: lattice clocks; optical lattice; lasers 679; 679 707 ... See more keywords
Transportable optical lattice clocks and general relativity
Sign Up to like & getrecommendations! Published in 2024 at "International Journal of Modern Physics D"
DOI: 10.1142/s0218271825400127
Abstract: Optical lattice clocks (OLCs) enable us to measure time and frequency with a fractional uncertainty at $10^{-18}$ level, which is 2 orders of magnitude better than Cs clocks. In this article, after briefly reviewing OLCs… read more here.
Keywords: lattice clocks; general relativity; optical lattice; transportable optical ... See more keywords