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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 9, Iss. 8 — Aug. 10, 2011
  • pp: 081201–081201

Experimental study on minimum resolvable velocity for heterodyne laser Doppler vibrometry

Jianhua Shang, Shuguang Zhao, Yan He, Weibiao Chen, and Ning Jia  »View Author Affiliations


Chinese Optics Letters, Vol. 9, Issue 8, pp. 081201-081201 (2011)


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Abstract

A high spatial resolution, high velocity resolution all-fiber laser Doppler vibrometry (LDV) based on heterodyne detection for vibration measurements is reported. A linewidth of 1-kHz single-mode continuous fiber laser, polarization-preserving fiber, and a telescope with 30-mm aperture are used in this LDV. With the inphase-quadrature circuit and the digital differentiating discriminator, a high velocity resolution of 96.9 nm/s and a high displacement resolution of 2.5 pm are obtained simultaneously with a glass attached to a piezoceramic transducer. These values correspond to the measurement uncertainties of vibration velocity and displacement within 4.14% and 4.6%, respectively.

© 2011 Chinese Optics Letters

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry

Citation
Jianhua Shang, Shuguang Zhao, Yan He, Weibiao Chen, and Ning Jia, "Experimental study on minimum resolvable velocity for heterodyne laser Doppler vibrometry," Chin. Opt. Lett. 9, 081201-081201 (2011)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-9-8-081201

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