Demonstration of a transportable 1 Hz-linewidth laser |
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Authors: | S Vogt C Lisdat T Legero U Sterr I Ernsting A Nevsky and S Schiller |
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Institution: | (1) Max Planck Research Group, Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, G?nther-Scharowsky-Str. 1/Bau24, 91058 Erlangen, Germany;(2) Max Planck Institute of Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany;(3) School of Physical and Mathematical Sciences, Nanyang Technological University, 1 Nanyang Walk Block 5, Level 3, Singapore, 637616, Singapore; |
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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 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. |
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