Optical frequency standards based on mercury and aluminum ions

W. M. Itano; J. C. Bergquist; A. Brusch; S. A. Diddams; T. M. Fortier; T. P. Heavner; L. Hollberg; D. B. Hume; S. R. Jefferts; L. Lorini; T. E. Parker; T. Rosenband; J. E. Stalnaker

doi:10.1117/12.734662

12 September 2007 Optical frequency standards based on mercury and aluminum ions

W. M. Itano, J. C. Bergquist, A. Brusch, S. A. Diddams, T. M. Fortier, T. P. Heavner, L. Hollberg, D. B. Hume, S. R. Jefferts, L. Lorini, T. E. Parker, T. Rosenband, J. E. Stalnaker

Author Affiliations +

Proceedings Volume 6673, Time and Frequency Metrology; 667303 (2007) https://doi.org/10.1117/12.734662
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Single-trapped-ion frequency standards based on a 282 nm transition in ¹⁹⁹Hg+ and on a 267 nm transition in ²⁷Al⁺ have been developed at NIST over the past several years. Their frequencies are measured relative to each other and to the NIST primary frequency standard, the NIST-F1 cesium fountain, by means of a self-referenced femtosecond laser frequency comb. Both ion standards have demonstrated instabilities and inaccuracies of less than 1 × 10^-16.

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W. M. Itano, J. C. Bergquist, A. Brusch, S. A. Diddams, T. M. Fortier, T. P. Heavner, L. Hollberg, D. B. Hume, S. R. Jefferts, L. Lorini, T. E. Parker, T. Rosenband, and J. E. Stalnaker "Optical frequency standards based on mercury and aluminum ions", Proc. SPIE 6673, Time and Frequency Metrology, 667303 (12 September 2007); https://doi.org/10.1117/12.734662

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