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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 22 — Nov. 15, 2005
  • pp: 3027–3029

Low-power optical vibration detection by photoconductance monitoring with a laser speckle pattern

Philip Heinz and Elsa Garmire  »View Author Affiliations


Optics Letters, Vol. 30, Issue 22, pp. 3027-3029 (2005)
http://dx.doi.org/10.1364/OL.30.003027


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Abstract

We present a quantitative evaluation of the performance of a photoconductance-monitoring sensor array in a speckle-based vibration detection configuration. The device is found to be capable of detecting nanometer-amplitude vibrations in a single shot with incident intensities of only a few microwatts per square centimeter at kilohertz frequencies. This performance indicates that the photoconductance-monitoring array requires approximately 3 orders of magnitude lower intensity to achieve the same displacement sensitivity as competing technologies, such as photo-electromotive-force detectors.

© 2005 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

ToC Category:
Instrumentation, Measurement, and Metrology

Citation
Philip Heinz and Elsa Garmire, "Low-power optical vibration detection by photoconductance monitoring with a laser speckle pattern," Opt. Lett. 30, 3027-3029 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-22-3027


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References

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