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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 11, Iss. 2 — Feb. 1, 2013
  • pp: 021201–

Infrasound detection by laser diode self-mixing interferometry

Chengwei Li, Zhen Huang, and Xiaogang Sun  »View Author Affiliations


Chinese Optics Letters, Vol. 11, Issue 2, pp. 021201- (2013)


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Abstract

An alternative technique for infrasound detection based on the self-mixing (SM) interference of a laser diode is described. The principle involved is the dependence of the power emitted by the laser diode on infrasound-induced membrane vibration. The Fourier transform and fringe-counting methods are used to analyze the self-mixing signal. Infrasound signals are experimentally measured from 2 to 20 Hz with a resolution of 0.25, and the results well agree with the theoretical ones.

© 2013 Chinese Optics Letters

OCIS Codes
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(230.1040) Optical devices : Acousto-optical devices
(280.3420) Remote sensing and sensors : Laser sensors

Citation
Chengwei Li, Zhen Huang, and Xiaogang Sun, "Infrasound detection by laser diode self-mixing interferometry," Chin. Opt. Lett. 11, 021201- (2013)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-11-2-021201

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