Ultrasonic hydrophone based on short in-fiber Bragg gratings

N.E. Fisher; D.J. Webb; C.N. Pannell; D.A. Jackson; L.R. Gavrilov; J.W. Hand; L. Zhang; I. Bennion

doi:10.1364/AO.37.008120

Ultrasonic hydrophone based on short in-fiber Bragg gratings

N.E. Fisher
, D.J. Webb
, C.N. Pannell
, D.A. Jackson
, L.R. Gavrilov
, J.W. Hand
, L. Zhang
, I. Bennion

Aston Institute of Photonic Technologies (AiPT)

University of Kent
Hammersmith Hospitals NHS Trust

Research output: Contribution to journal › Article › peer-review

85 Citations (Scopus)

172 Downloads (Pure)

Abstract

We investigate the feasibility of using in-fiber Bragg gratings for measuring acoustic fields in the megahertz range. We found that the acoustic coupling from the ultrasonic field to the grating leads to the formation of standing waves in the fiber. Because of these standing waves, the system response is complex and, as we show, the grating does not act as an effective probe. However, significant improvement in its performance can be gained by use of short gratings coupled with an appropriate desensitization of the fiber. A noise-limited pressure resolution of ˜4.5 × 10-3 atm/vHz was found.

Original language	English
Pages (from-to)	8120-8128
Number of pages	9
Journal	Applied Optics
Volume	37
Issue number	34
DOIs	https://doi.org/10.1364/AO.37.008120
Publication status	Published - 1 Dec 1998

Bibliographical note

© 1998 Optical Society of America This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-34-8120. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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10.1364/AO.37.008120

Ultrasonic hydrophone based on short in-fiber Bragg gratings
© 1998 Optical Society of America This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-34-8120. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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abstract = "We investigate the feasibility of using in-fiber Bragg gratings for measuring acoustic fields in the megahertz range. We found that the acoustic coupling from the ultrasonic field to the grating leads to the formation of standing waves in the fiber. Because of these standing waves, the system response is complex and, as we show, the grating does not act as an effective probe. However, significant improvement in its performance can be gained by use of short gratings coupled with an appropriate desensitization of the fiber. A noise-limited pressure resolution of ˜4.5 × 10-3 atm/vHz was found.",

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AU - Fisher, N.E.

AU - Webb, D.J.

AU - Pannell, C.N.

AU - Jackson, D.A.

AU - Gavrilov, L.R.

AU - Hand, J.W.

AU - Zhang, L.

AU - Bennion, I.

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AB - We investigate the feasibility of using in-fiber Bragg gratings for measuring acoustic fields in the megahertz range. We found that the acoustic coupling from the ultrasonic field to the grating leads to the formation of standing waves in the fiber. Because of these standing waves, the system response is complex and, as we show, the grating does not act as an effective probe. However, significant improvement in its performance can be gained by use of short gratings coupled with an appropriate desensitization of the fiber. A noise-limited pressure resolution of ˜4.5 × 10-3 atm/vHz was found.

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JO - Applied Optics

JF - Applied Optics

IS - 34

ER -

Ultrasonic hydrophone based on short in-fiber Bragg gratings

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