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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 16 — Aug. 15, 2013
  • pp: 3107–3110

Precision Doppler measurements with steep dispersion

Umberto Bortolozzo, Stefania Residori, and John C. Howell  »View Author Affiliations


Optics Letters, Vol. 38, Issue 16, pp. 3107-3110 (2013)
http://dx.doi.org/10.1364/OL.38.003107


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Abstract

Controlling the group velocity of light is a valuable resource for quantum and classical optical processing and high performance sensor technologies. In this context, slow-light (SL) and the associated steep dispersion have been proposed to increase the sensitivity of certain types of interferometers. Here, we show that the interaction of two intensity-balanced light beams in a SL medium can be used to detect Doppler shifts with extremely high sensitivity. By using this effect in a liquid crystal light-valve, we have been able to measure Doppler shifts as low as 1 μHz with an integration time of only 1 s. The shot noise limited sensitivity inversely depends on the steepness of the beam-coupling dispersive response. This method allows for remote sensing of very slowly moving objects with a linear response over 5 orders of magnitude.

© 2013 Optical Society of America

OCIS Codes
(260.2030) Physical optics : Dispersion
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: May 3, 2013
Revised Manuscript: July 4, 2013
Manuscript Accepted: July 9, 2013
Published: August 13, 2013

Citation
Umberto Bortolozzo, Stefania Residori, and John C. Howell, "Precision Doppler measurements with steep dispersion," Opt. Lett. 38, 3107-3110 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-16-3107

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