Accurate laser frequency locking to optical frequency combs under low-signal-to-noise-ratio conditions

We demonstrate a method for accurately locking the frequency of a continuous-wave laser to an optical frequency comb under conditions where the signal-to-noise ratio is low, too low to accommodate other methods. Our method is typically orders of magnitude more accurate than conventional wavemeters a...

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Bibliographic Details
Published in:Review of scientific instruments 2020-03, Vol.91 (3), p.033202-033202
Main Authors: Guo, C., Favier, M., Galland, N., Cambier, V., Álvarez-Martínez, H., Lours, M., De Sarlo, L., Andia, M., Le Targat, R., Bize, S.
Format: Article
Language:English
Subjects:
Astrophysics
Atomic Physics
Continuous wave lasers
Dipoles
Frequency control
Frequency locking
Optical frequency
Optical lattices
Physics
Scientific apparatus & instruments
Signal to noise ratio
Wavemeters
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Summary:We demonstrate a method for accurately locking the frequency of a continuous-wave laser to an optical frequency comb under conditions where the signal-to-noise ratio is low, too low to accommodate other methods. Our method is typically orders of magnitude more accurate than conventional wavemeters and can considerably extend the usable wavelength range of a given optical frequency comb. We illustrate our method by applying it to the frequency control of a dipole lattice trap for an optical lattice clock, a representative case where our method provides significantly better accuracy than other methods.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5140793