A transportable strontium optical lattice clock

Abstract

We report on a transportable optical clock, based on laser-cooled strontium atoms trapped in an optical lattice. The experimental apparatus is composed of a compact source of ultra-cold strontium atoms including a compact cooling laser set-up and a transportable ultra-stable laser for interrogating the optical clock transition. The whole setup (excluding electronics) fits within a volume of less than 2 m${}^3$. The high degree of operation reliability of both systems allowed the spectroscopy of the clock transition to be performed with 10 Hz resolution. We estimate an uncertainty of the clock of $7\times 10^{-15}$.

12 pages, 9 figures, to be published in Appl. Phys. B

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• Quantum Physics Exploring Gravity in the Outer Solar System: The Sagas Project
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• A compact atomic beam based system for Doppler-free laser spectroscopy of Strontium atoms
• Exploration of the magnetic-field-induced $5s5p$~${}^3{P}_0$~-~$5s^2$~${}^1{S}_0$ forbidden transition in bosonic Sr atom