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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 28 — Oct. 1, 2008
  • pp: 5123–5129

Low-cost fiber Bragg grating vibroacoustic sensor for voice and heartbeat detection

Daniele Tosi, Massimo Olivero, and Guido Perrone  »View Author Affiliations

Applied Optics, Vol. 47, Issue 28, pp. 5123-5129 (2008)

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A fiber Bragg grating (FBG) vibroacoustic sensor exploiting an intensity-based interrogation principle is presented. The optical system is complemented by signal processing techniques that allow disturbances to be mitigated and improve the spectral estimation. The sensor is capable of performing frequency analysis of sounds up to 3 kHz , with top sensitivity in the 100 500 Hz frequency range, and of dynamically tracking pulsed phenomena that induce a strain to the FBG. The sensor has been applied to the detection of voice, showing a great intelligibility of the speech despite the low-quality environment, and to the monitoring of the heartbeat rate from the wrist.

© 2008 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 3, 2008
Revised Manuscript: August 12, 2008
Manuscript Accepted: August 13, 2008
Published: September 24, 2008

Virtual Issues
Vol. 3, Iss. 12 Virtual Journal for Biomedical Optics

Daniele Tosi, Massimo Olivero, and Guido Perrone, "Low-cost fiber Bragg grating vibroacoustic sensor for voice and heartbeat detection," Appl. Opt. 47, 5123-5129 (2008)

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