Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 117, Issue 4, Pages 1107-1116Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-014-5932-9
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Funding
- ESA
- European Union [263500]
- European Metrology Research Program (EMRP) [IND14]
- EMRP participating countries within EURAMET
- EMRP participating countries within European Union
- DFG [RTG 1729]
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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 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 a relative uncertainty of the clock of 7 x 10(-15).
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