Spectroscopy and frequency measurement of the ${}^{87}$Sr clock transition by laser linewidth transfer using an optical frequency comb

Abstract

We perform spectroscopic observations of the 698-nm clock transition in ${}^{87}$Sr confined in an optical lattice using a laser linewidth transfer technique. A narrow-linewidth laser interrogating the clock transition is prepared by transferring the linewidth of a master laser (1064 nm) to that of a slave laser (698 nm) with a high-speed controllable fiber-based frequency comb. The Fourier-limited spectrum is observed for an 80-ms interrogating pulse. We determine that the absolute frequency of the 5s${}^2$ ${}^1$S${}_0$ - 5s5p ${}^3$P${}_0$ clock transition in ${}^{87}$Sr is 429 228 004 229 872.0 (1.6) Hz referenced to the SI second.

5 pages, 4 figures

References in corpus (6)

• The absolute frequency of the 87Sr optical clock transition
• High accuracy correction of blackbody radiation shift in an optical lattice clock
• Measuring the frequency of a Sr optical lattice clock using a 120-km coherent optical transfer
• One-Dimensional Optical Lattice Clock with a Fermionic 171Yb Isotope
• An Optical Lattice Clock with Spin-polarized 87Sr Atoms
• Direct comparison of a Ca+ single ion clock against a Sr optical lattice clock

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• SI-traceable measurement of an optical frequency at low $10^{-16}$ level without a local primary standard
• A strontium optical lattice clock with $1\times 10^{-17}$ uncertainty and measurement of its absolute frequency
• Intermittent optical frequency measurements to reduce the dead time uncertainty of frequency link
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• Least-squares analysis of clock frequency comparison data to deduce optimized frequency and frequency ratio values
• Absolute frequency measurement of the ${}^2$S${}_{1/2}{\to }^2$F${}_{7/2}$ optical clock transition in ${}^{171}$Yb${}^{+}$ with an uncertainty of $4\times 10^{-16}$ using a frequency link to International Atomic Time
• Absolute frequency measurement with uncertainty below $1\times 10^{-15}$ using International Atomic Time
• Improved frequency measurement of the ${}^1{S}_0$-${}^3{P}_0$ clock transition in ${}^{87}$Sr using the Cs fountain clock at NMIJ as a transfer oscillator
• Uncertainty evaluation of an ${}^{171}$Yb optical lattice clock at NMIJ
• Improved Frequency Ratio Measurement with 87Sr and 171Yb Optical Lattice Clocks at NMIJ
• Protected subspace Ramsey spectroscopy
• Generation of a precise time scale assisted by a near-continuously operating optical lattice clock