OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 27 — Sep. 20, 2008
  • pp: 4952–4958

Laser Doppler vibrometer employing active frequency feedback

Akobuije Chijioke and John Lawall  »View Author Affiliations


Applied Optics, Vol. 47, Issue 27, pp. 4952-4958 (2008)
http://dx.doi.org/10.1364/AO.47.004952


View Full Text Article

Enhanced HTML    Acrobat PDF (1588 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We present a heterodyne Michelson interferometer for vibration measurement in which feedback is used to obviate the need to unwrap phase data. The Doppler shift of a vibrating target mirror is sensed interferometrically and compensated by means of a voltage-controlled oscillator driving an acousto-optic modulator. For frequencies within the servo bandwidth, the oscillator control voltage provides a direct measurement of the target velocity. Outside the servo bandwidth, phase-sensitive detection is used to evaluate high-frequency displacements. This approach is of great interest for the frequently-occurring situation where vibration amplitudes at low frequency exceed an optical wavelength, but knowledge of the vibration spectrum at high frequency is important as well.

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.7250) Instrumentation, measurement, and metrology : Velocimetry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 20, 2008
Revised Manuscript: July 21, 2008
Manuscript Accepted: August 6, 2008
Published: September 17, 2008

Citation
Akobuije Chijioke and John Lawall, "Laser Doppler vibrometer employing active frequency feedback," Appl. Opt. 47, 4952-4958 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-27-4952

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited