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arXiv · 1010.2685

Demonstration of a Transportable 1 Hz-Linewidth Laser

Stefan Vogt·Christian Lisdat·Thomas Legero·Uwe Sterr·Ingo Ernsting·Alexander Nevsky·Stephan Schiller
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Abstract

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 by a Ti:Sapphire frequency comb used as a transfer oscillator. The thus 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.

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Stefan Vogt, Christian Lisdat, Thomas Legero, Uwe Sterr, Ingo Ernsting, Alexander Nevsky, Stephan Schiller. 2011-05-18. Demonstration of a Transportable 1 Hz-Linewidth Laser. https://doi.org/10.1007/s00340-011-4652-7

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