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

Compact acoustic sensor based on air-backed mandrel coiled with optical microfiber
Compact acoustic sensor based on air-backed mandrel coiled with optical microfiber
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.
0146-9592
4720-4722
Chen, George Y.
b766d3f7-a6dc-4c15-8f00-17ad044348c1
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7
Chen, George Y.
b766d3f7-a6dc-4c15-8f00-17ad044348c1
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Newson, Trevor P.
6735857e-d947-45ec-8163-54ebb25daad7

Chen, George Y., Brambilla, Gilberto and Newson, Trevor P. (2012) Compact acoustic sensor based on air-backed mandrel coiled with optical microfiber. Optics Letters, 37 (22), 4720-4722. (doi:10.1364/OL.37.004720).

Record type: Article

Abstract

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.

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More information

Published date: 2012
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 350146
URI: https://eprints.soton.ac.uk/id/eprint/350146
ISSN: 0146-9592
PURE UUID: e2d4d918-dac9-4e33-bc25-4b000a47121c

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Date deposited: 19 Mar 2013 14:14
Last modified: 31 Oct 2017 17:34

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Contributors

Author: George Y. Chen

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