Applied Physics B

, 104:741

Demonstration of a transportable 1 Hz-linewidth laser


DOI: 10.1007/s00340-011-4652-7

Cite this article as:
Vogt, S., Lisdat, C., Legero, T. et al. Appl. Phys. B (2011) 104: 741. doi:10.1007/s00340-011-4652-7


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.

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

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