Applied Physics B

, Volume 117, Issue 4, pp 1107–1116 | Cite as

A transportable strontium optical lattice clock

  • N. Poli
  • M. Schioppo
  • S. Vogt
  • St. Falke
  • U. Sterr
  • Ch. Lisdat
  • G. M. Tino


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.


Atomic Beam Amplify Spontaneous Emission Absorption Imaging Optical Clock Clock Transition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors acknowledge financial support from ESA and the European Union Seventh Framework Program (FP7/2007-2013 Grant agreement 263500, project “Space Optical Clocks”) and the European Metrology Research Program (EMRP) under IND14. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union. We also acknowledge support by the DFG RTG 1729 “Fundamentals and applications of ultra-cold matter”. We thank D. V. Sutyrin for useful discussions.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • N. Poli
    • 1
  • M. Schioppo
    • 1
    • 3
  • S. Vogt
    • 2
  • St. Falke
    • 2
    • 4
  • U. Sterr
    • 2
  • Ch. Lisdat
    • 2
  • G. M. Tino
    • 1
  1. 1.Dipartimento di Fisica e Astronomia and LENSUniversità di Firenze and INFN Sezione di FirenzeSesto FiorentinoItaly
  2. 2.Physikalisch-Technische BundesanstaltBraunschweigGermany
  3. 3.Time and Frequency DivisionNational Institute of Standards and TechnologyBoulderUSA
  4. 4.TOPTICA Photonics AGGräfelfingGermany

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