Intercombination line frequencies in 171Yb validated with the clock transition

We have carried absolute frequency measurements of the (6ð' 2)1ð'†0−(6ð' 6ð')3ð'f1 transition in 171Yb (intercombination line), where the spin-1/2 isotope yields two hyperfine lines. The measurements rely on sub-Doppler spectroscopy to yield a discriminator to which a...

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Bibliographic Details
Published in:Applied optics (2004) 2023-05, Vol.62 (15), p.3932
Main Authors: Jones, Daniel M, van Kann, Frank, McFerran, John J
Format: Article
Language:English
Subjects:
Frequency measurement
Laser cooling
Optical frequency
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Summary:We have carried absolute frequency measurements of the (6ð' 2)1ð'†0−(6ð' 6ð')3ð'f1 transition in 171Yb (intercombination line), where the spin-1/2 isotope yields two hyperfine lines. The measurements rely on sub-Doppler spectroscopy to yield a discriminator to which a 556 nm laser is locked. The frequency reference for the optical frequency measurements is a high-quality quartz oscillator steered to the GNSS time scale that is bridged with a frequency comb. The reference is validated to ∼3×10−12 by spectroscopy on the 1ð'†0−3ð'f0 (clock) line in laser cooled and trapped 171Yb atoms. From the hyperfine separation between the 𝐹=1/2 and 𝐹=3/2 levels of 3ð'f1, we determine the hyperfine constant to be 𝐴(3ð'f1)=3957833(28)kHz.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.488653