Demonstration of a Transportable 1 Hz-Linewidth Laser

Details Demonstration of a Transportable 1 Hz-Linewidth Laser Demonstration of a Transportable 1 Hz-Linewidth Laser

2010-10-13

arxiv.org/abs/1010.2685v2

Physics

Optics

3 pages, 4 figures

Scientific paper

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 D\"usseldorf, 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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