Ultrasonic hydrophone based on short in-fiber Bragg gratings

Fisher, Norman E. and Webb, David J. and Pannell, Christopher N. and Jackson, David A. and Gavrilov, Leonid and Hand, J.W. and Zhang, Leishi and Bennion, Ian (1998) Ultrasonic hydrophone based on short in-fiber Bragg gratings. Applied Optics, 37 (34). pp. 8120-8128. ISSN 0003-6935. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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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 approximate to 4.5 x 10(-3) atm/root Hz was found.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunications > TK5103.59 Optical communications, Fibre-optics
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts
Depositing User: R.F. Xu
Date Deposited: 28 Apr 2009 16:17
Last Modified: 25 Jun 2014 14:52
Resource URI: https://kar.kent.ac.uk/id/eprint/17730 (The current URI for this page, for reference purposes)
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