Applied Physics B

, 104:741 | Cite as

Demonstration of a transportable 1 Hz-linewidth laser

  • S. Vogt
  • C. Lisdat
  • T. Legero
  • U. Sterr
  • I. Ernsting
  • A. Nevsky
  • S. Schiller


We present the setup and test of a transportable clock laser at 698 nm for a strontium lattice clock. A master-slave diode laser system is stabilized to a rigidly mounted optical reference cavity. The setup was transported by truck over 400 km from Braunschweig to Düsseldorf, where the cavity-stabilized laser was compared to a stationary clock laser for the interrogation of ytterbium (578 nm). Only minor realignments were necessary after the transport. The lasers were compared using a Ti:Sapphire frequency comb as a transfer oscillator. The generated virtual beat showed a combined linewidth below 1 Hz (at 1156 nm). The transport back to Braunschweig did not degrade the laser performance, as was shown by interrogating the strontium clock transition.


Drift Rate Frequency Comb Heat Shield Optical Clock Beat Note 
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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Physikalisch-Technische Bundesanstalt (PTB)BraunschweigGermany
  2. 2.Institut für ExperimentalphysikHeinrich-Heine-Universität DüsseldorfDüsseldorfGermany

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