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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 22 — Nov. 15, 2012
  • pp: 4720–4722

Compact acoustic sensor based on air-backed mandrel coiled with optical microfiber

George Y. Chen, Gilberto Brambilla, and Trevor P. Newson  »View Author Affiliations

Optics Letters, Vol. 37, Issue 22, pp. 4720-4722 (2012)

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We propose and demonstrate a compact acoustic sensor comprising a 2 μm diam, 35 mm length optical microfiber coiled around a 3 mm diam air-backed mandrel. Acoustic waves induce local pressure variations that change the mandrel diameter and thus the optical path length of the mode propagating in the microfiber. The phase modulation is detected via a single-fiber polarimetric interferometer. The low stiffness and minimum bend radii of microfibers gives rise to extremely small package sizes without compromising acoustic responsivity.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(280.5475) Remote sensing and sensors : Pressure measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 29, 2012
Revised Manuscript: September 28, 2012
Manuscript Accepted: September 29, 2012
Published: November 14, 2012

George Y. Chen, Gilberto Brambilla, and Trevor P. Newson, "Compact acoustic sensor based on air-backed mandrel coiled with optical microfiber," Opt. Lett. 37, 4720-4722 (2012)

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