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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 11 — Nov. 1, 2010
  • pp: 2450–2458

Comparative study of autodyne and heterodyne laser interferometry for imaging

Eric Lacot, Olivier Jacquin, Grégoire Roussely, Olivier Hugon, and Hugues Guillet de Chatellus  »View Author Affiliations


JOSA A, Vol. 27, Issue 11, pp. 2450-2458 (2010)
http://dx.doi.org/10.1364/JOSAA.27.002450


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Abstract

For given laser output power, object under investigation, and photodiode noise level, we have theoretically compared the signal-to-noise ratios of a heterodyne scanning imager based on a Michelson interferometer and of an autodyne setup based on the laser optical feedback imaging (LOFI) technique. In both cases, the image is obtained point by point. In the heterodyne configuration, the beating between the reference beam and the signal beam is realized outside the laser cavity (i.e., directly on the detector), while in the autodyne configuration, the wave beating takes place inside the laser cavity and therefore is indirectly detected. In the autodyne configuration, where the laser relaxation oscillations play a leading role, we have compared one-dimensional scans obtained by numerical simulations with different lasers' dynamical parameters. Finally, we have determined the best laser for LOFI applications and the experimental conditions for which the LOFI detection setup (autodyne interferometer) is competitive compared to a heterodyne interferometer.

© 2010 Optical Society of America

OCIS Codes
(280.3420) Remote sensing and sensors : Laser sensors
(110.3175) Imaging systems : Interferometric imaging

ToC Category:
Imaging Systems

History
Original Manuscript: July 8, 2010
Revised Manuscript: September 17, 2010
Manuscript Accepted: September 17, 2010
Published: October 22, 2010

Citation
Eric Lacot, Olivier Jacquin, Grégoire Roussely, Olivier Hugon, and Hugues Guillet de Chatellus, "Comparative study of autodyne and heterodyne laser interferometry for imaging," J. Opt. Soc. Am. A 27, 2450-2458 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-11-2450

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