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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 11 — Nov. 1, 2006
  • pp: 2393–2397

Passive atomic frequency standard based on coherent population trapping in Rb 87 using injection-locked lasers

Han Seb Moon, Sang Eon Park, Young-Ho Park, Lim Lee, and Jung Bog Kim  »View Author Affiliations

JOSA B, Vol. 23, Issue 11, pp. 2393-2397 (2006)

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We present a microwave frequency standard based on coherent population trapping (CPT) in the Rb 87 D 1 line. The CPT spectrum is obtained using two Raman lasers with a 6.8 GHz frequency offset by injection locking of a master laser to a slave laser. We have constructed an atomic clock employing a 5 cm long Rb vapor cell confined with 6.67 kPa neon buffer gas at 70 ° C . Using this system, we improve the CPT contrast through the elimination of undesired off-resonant fields created by the direct modulation method. We measured the frequency shift of the CPT signal as a function of the temperature of the Rb cell and estimated it to be approximately 1.3 × 10 9 K . The frequency of a 10 MHz crystal oscillator has been stabilized to the CPT spectrum between the two ground states in Rb 87 . The relative frequency stability is approximately 2.3 × 10 12 for an average time of 68 s .

© 2006 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(140.3520) Lasers and laser optics : Lasers, injection-locked

ToC Category:
Quantum Optics

Original Manuscript: March 7, 2006
Revised Manuscript: June 27, 2006
Manuscript Accepted: June 28, 2006

Han Seb Moon, Sang Eon Park, Young-Ho Park, Lim Lee, and Jung Bog Kim, "Passive atomic frequency standard based on coherent population trapping in 87Rb using injection-locked lasers," J. Opt. Soc. Am. B 23, 2393-2397 (2006)

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