Abstract/Details

Microfabricated atomic clocks based on coherent population trapping


2007 2007

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Abstract (summary)

This work was focussed on the development and improvement in the technology of miniature atomic clocks. The aim was to combine the microelectromechanical systems (MEMS) technology with advanced atomic interrogation techniques to produce high performance atomic clocks that are suitable for many new applications such as in hand held GPS receivers and cellular phones. The use of MEMS techniques allowed over a hundred fold reduction in size and power requirements of miniature atomic clocks. This combined with MEMS mass production capabilities has opened up whole new avenues for applying atomic clock technology.

During the course of this thesis work, we demonstrated the first prototype physics package of a microfabricated atomic clock. The physics package had typical fractional frequency instability of 4 × 10-11 at 1 s, had a volume of 12 mm3, and consumed less than 75 mW of power. Several new and innovative schemes were then proposed and developed to further improve the performance of microfabricated atomic clocks. These techniques focused on increasing the strength of the atomic resonance, increasing the contrast of the atomic resonance, reducing the noise accompanying the atomic resonance and reducing light-shift-induced frequency drifts in atomic clocks. At this stage, a majority of the ground work has been done for implementation of these advanced techniques in a miniature physics package.

Indexing (details)


Subject
Atoms & subatomic particles;
Optics
Classification
0748: Atoms & subatomic particles
0752: Optics
Identifier / keyword
Pure sciences; Atomic clocks; Coherent population trapping; Microfabrication
Title
Microfabricated atomic clocks based on coherent population trapping
Author
Shah, Vishal
Number of pages
122
Publication year
2007
Degree date
2007
School code
0051
Source
DAI-B 68/03, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Kitching, John
University/institution
University of Colorado at Boulder
University location
United States -- Colorado
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3256459
ProQuest document ID
304857543
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304857543
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