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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6400–6405

Spin-polarized dark state free CPT state preparation with co-propagating left and right circularly polarized lasers

Yi Zhang, Suping Qu, and Sihong Gu  »View Author Affiliations

Optics Express, Vol. 20, Issue 6, pp. 6400-6405 (2012)

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We have developed and experimentally studied a coherent population trapping (CPT) state preparation scheme for atomic clock application with co-propagating left and right circularly polarized lasers. With realization of constructive interference and spin-polarized dark state free in CPT state preparation, we have obtained CPT resonance signal 3 times larger than that of the conventional scheme used in atomic clock. Polarization fluctuations and CPT signal sensitivity to laser power behaviors are both improved with the scheme. Our study reveals that it is a promising candidate for both normal-size and chip-scale CPT atomic clocks.

© 2012 OSA

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

ToC Category:
Atomic and Molecular Physics

Original Manuscript: January 3, 2012
Revised Manuscript: February 8, 2012
Manuscript Accepted: February 27, 2012
Published: March 5, 2012

Yi Zhang, Suping Qu, and Sihong Gu, "Spin-polarized dark state free CPT state preparation with co-propagating left and right circularly polarized lasers," Opt. Express 20, 6400-6405 (2012)

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