Fisher, N.E. and Webb, D.J. and Pannell, C.N. and Jackson, D.A. and Gavrilov, L.R. and Hand, J.W. and Zhang, L.S. and Bennion, I. (1998) Ultrasonic hydrophone based on short in-fiber Bragg gratings. Applied Optics, 37 (34). pp. 8120-8128. ISSN 0003-6935.
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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.
|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:||28 Apr 2009 16:17|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17730 (The current URI for this page, for reference purposes)|
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