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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 8 — Aug. 1, 2014
  • pp: 1997–2001

Saturation of atomic transitions using subwavelength diameter tapered optical fibers in rubidium vapor

D. E. Jones, J. D. Franson, and T. B. Pittman  »View Author Affiliations


JOSA B, Vol. 31, Issue 8, pp. 1997-2001 (2014)
http://dx.doi.org/10.1364/JOSAB.31.001997


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Abstract

We experimentally investigate ultralow-power saturation of the rubidium D2 transitions using a tapered optical fiber (TOF) suspended in a warm Rb vapor. A direct comparison of power-dependent absorption measurements for the TOF system with those obtained in a standard free-space vapor cell system highlights the differences in saturation behavior for the two systems. The effects of hyperfine pumping in the TOF system are found to be minimized due to the short atomic transit times through the highly confined evanescent optical mode guided by the TOF. The TOF system data are well-fit by a relatively simple empirical absorption model that indicates nanoWatt-level saturation powers.

© 2014 Optical Society of America

OCIS Codes
(190.4360) Nonlinear optics : Nonlinear optics, devices
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6460) Spectroscopy : Spectroscopy, saturation
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Spectroscopy

History
Original Manuscript: March 27, 2014
Manuscript Accepted: June 16, 2014
Published: July 31, 2014

Citation
D. E. Jones, J. D. Franson, and T. B. Pittman, "Saturation of atomic transitions using subwavelength diameter tapered optical fibers in rubidium vapor," J. Opt. Soc. Am. B 31, 1997-2001 (2014)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-8-1997


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