Demonstration of a transportable 1 Hz-linewidth laser

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-stabil...

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Published inApplied physics. B, Lasers and optics Vol. 104; no. 4; pp. 741 - 745
Main Authors Vogt, S., Lisdat, C., Legero, T., Sterr, U., Ernsting, I., Nevsky, A., Schiller, S.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.09.2011
Subjects
Clocks
Engineering
Holes
Interrogation
Lasers
Optical Devices
Optics
Oscillators
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Strontium
Transport
Ytterbium
Drift Rate
Optical Clock
Frequency Comb
Beat Note
Heat Shield
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-011-4652-7