The Chip-Scale Atomic Clock - Coherent Population Trapping Vs. Conventional Interrogation

R. Lutwak, D. Emmons, W. Riley, R. M. Garvey

Abstract:	Symmetricom-TRC has undertaken a development effort to produce a prototype chip-scale atomic clock (CSAC). The overall architecture of the CSAC and, in particular, the physics package, must be defined early in the project, prior to the onset of a large-scale engineering effort. Within the constraints imposed by the performance goals of the project, we have recognized two possible schemes for interrogating the ground-state hyperfine frequency of the gaseous atomic ensemble: the conventional double-resonance technique and the coherent population trapping technique. In this paper, we describe a laboratory apparatus, which allows for in situ comparison of the two techniques, without the ambiguities associated with comparing data from disparate experiments. Data are presented comparing the short-term stability resultant of the two techniques, as well as environmental sensitivity to resonance cell temperature, laser intensity, and RF power.
Published in:	Proceedings of the 34th Annual Precise Time and Time Interval Systems and Applications Meeting December 3 - 5, 2002 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	539 - 550
Cite this article:	Lutwak, R., Emmons, D., Riley, W., Garvey, R. M., "The Chip-Scale Atomic Clock - Coherent Population Trapping Vs. Conventional Interrogation," Proceedings of the 34th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, December 2002, pp. 539-550.
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