A transportable strontium optical lattice clock
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- Poli, N., Schioppo, M., Vogt, S. et al. Appl. Phys. B (2014) 117: 1107. doi:10.1007/s00340-014-5932-9
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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 setup and a transportable ultra-stable laser for interrogating the optical clock transition. The whole setup (excluding electronics) fits within a volume of <2 m3. 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 a relative uncertainty of the clock of 7 × 10−15.