Trapped ion optical frequency standards

Optical frequency standards based on narrow absorptions in laser-cooled single trapped ions have recently begun to demonstrate stabilities that are competitive with cold atom fountain microwave standards. This paper presents a short review of the wider state-of-the-art development of these single co...

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Bibliographic Details
Published in:Measurement science & technology 2003-08, Vol.14 (8), p.1174-1186
Main Authors: Gill, P, Barwood, G P, Klein, H A, Huang, G, Webster, S A, Blythe, P J, Hosaka, K, Lea, S N, Margolis, H S
Format: Article
Language:English
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Summary:Optical frequency standards based on narrow absorptions in laser-cooled single trapped ions have recently begun to demonstrate stabilities that are competitive with cold atom fountain microwave standards. This paper presents a short review of the wider state-of-the-art development of these single cold trapped ion frequency standards, coupled with a more detailed account of recent results achieved at National Physical Laboratory in respect pf single ion systems based on ]8]8Sr]+, ]8]7Sr]+ and ]1]7]1Yb]+. Narrow linewidth data for the optical clock quadrupole and octupole transitions respectively at 674 nm in ]8]8Sr]+ and 467 nm in ]1]7]1Yb]+, are presented, together with a discussion of current systematics and future projections. The potential for optical clock operation is outlined.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/14/8/302