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US-2015372687-A1 · Dec 24, 2015 · US
Frequency stabilization of an atomic clock against variations of the C-field
US9048852B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9048852-B2 |
| Application number | US-201214002583-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 6, 2012 |
| Priority date | Mar 1, 2011 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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Abstract
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The frequency of an atomic clock may be stabilized against C-field variation by applying a rf magnetic field perpendicular to the C-field to cause a coherent population transfer between Zeeman states that compensates for quadratic frequency shift of transitions of the clock. The cancellation, provided by a feed-forward mechanism, is exact. The invention can be implemented in any atomic clock by including an electrode in the clock generating a magnetic field perpendicular to the C-field, and providing an electronic circuit to send rf signals to the electrode.
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The invention claimed is: 1. A method of stabilizing frequency of an atomic clock against variations and non-uniformity of C-field, the method comprising applying microwave Ramsey pulses to a source of atoms before and after the atoms drift in the C-field along a trajectory to produce a microwave Ramsey signal, and applying a radiofrequency (rf) magnetic field perpendicular to the C-field to cause a coherent population transfer between Zeeman states that compensates for quadratic f…
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Frequently asked questions
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- What does patent US9048852B2 cover?
- The frequency of an atomic clock may be stabilized against C-field variation by applying a rf magnetic field perpendicular to the C-field to cause a coherent population transfer between Zeeman states that compensates for quadratic frequency shift of transitions of the clock. The cancellation, provided by a feed-forward mechanism, is exact. The invention can be implemented in any atomic clock by…
- Who is the assignee on this patent?
- Marmet Louis, Nat Res Council Canada
- What technology area does this patent fall under?
- Primary CPC classification H03L7/26. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 02 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).