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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 15, Iss. 10 — Oct. 1, 1998
  • pp: 2626–2630

Sub-shot-noise FM noise spectroscopy of trapped rubidium atoms

Steven Kasapi, Seema Lathi, and Yoshihisa Yamamoto  »View Author Affiliations

JOSA B, Vol. 15, Issue 10, pp. 2626-2630 (1998)

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We demonstrate that the large FM noise of a semiconductor laser can be combined with a squeezed AM noise spectrum to make a sub-shot-noise, FM-noise-based spectroscopic measurement. In particular, we probe the spectrum of magneto-optically trapped and cooled rubidium atoms using the FM noise on squeezed AM background noise. The natural absorption line as well as a stimulated Raman transition are clearly visible in the FM-to-AM converted noise even though the signal is below the classical shot-noise level.

© 1998 Optical Society of America

OCIS Codes
(000.1600) General : Classical and quantum physics
(140.5960) Lasers and laser optics : Semiconductor lasers
(270.5290) Quantum optics : Photon statistics
(270.6570) Quantum optics : Squeezed states

Steven Kasapi, Seema Lathi, and Yoshihisa Yamamoto, "Sub-shot-noise FM noise spectroscopy of trapped rubidium atoms," J. Opt. Soc. Am. B 15, 2626-2630 (1998)

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