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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 34 — Dec. 1, 1998
  • pp: 8120–8128

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, and I. Bennion  »View Author Affiliations


Applied Optics, Vol. 37, Issue 34, pp. 8120-8128 (1998)
http://dx.doi.org/10.1364/AO.37.008120


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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/√Hz was found.

© 1998 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.7170) Medical optics and biotechnology : Ultrasound

History
Original Manuscript: June 1, 1998
Revised Manuscript: September 21, 1998
Published: December 1, 1998

Citation
N. E. Fisher, D. J. Webb, C. N. Pannell, D. A. Jackson, L. R. Gavrilov, J. W. Hand, L. Zhang, and I. Bennion, "Ultrasonic hydrophone based on short in-fiber Bragg gratings," Appl. Opt. 37, 8120-8128 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-34-8120

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