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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 3 — Mar. 1, 2010
  • pp: 417–422

Performance of a prototype atomic clock based on lin lin coherent population trapping resonances in Rb atomic vapor

Eugeniy E. Mikhailov, Travis Horrom, Nathan Belcher, and Irina Novikova  »View Author Affiliations


JOSA B, Vol. 27, Issue 3, pp. 417-422 (2010)
http://dx.doi.org/10.1364/JOSAB.27.000417


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Abstract

We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields ( lin lin configuration). Our apparatus uses a vertical-cavity surface-emitting laser (VCSEL) tuned to the D 1 line of Rb 87 with the current modulation at the Rb 87 hyperfine frequency. We demonstrate cancellation of the first-order light shift by the proper choice of rf modulation power and further improve our prototype clock stability by optimizing the parameters of the microwave lock loop. Operating in these optimal conditions, we measured a short-term fractional frequency stability (Allan deviation) 2 × 10 11 τ 1 2 for observation times 1 s τ 20 s . This value is limited by large VCSEL phase noise and environmental temperature fluctuation. Further improvements in frequency stability should be possible with an apparatus designed as a dedicated lin lin CPT resonance clock with environmental impacts minimized.

© 2010 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.3690) Atomic and molecular physics : Line shapes and shifts
(270.1670) Quantum optics : Coherent optical effects

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: November 2, 2009
Revised Manuscript: December 1, 2009
Manuscript Accepted: December 2, 2009
Published: February 4, 2010

Citation
Eugeniy E. Mikhailov, Travis Horrom, Nathan Belcher, and Irina Novikova, "Performance of a prototype atomic clock based on lin‖lin coherent population trapping resonances in Rb atomic vapor," J. Opt. Soc. Am. B 27, 417-422 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-3-417


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