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13 February 1990 Fiber-Optic Oblate Flextensional Hydrophone
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Abstract
When an oblate spheroidal shell having an aspect ratio aib > (2-v)112, where v Poisson's ratio, is subject to hydrostatic compression, the semi-major, a, and semi-minor, b, axes experience strain of opposite sign. If two optical fibers, which comprise the arms of an interferometer, are wound around the equatorial and meridional circumferences of the spheroid, pressure changes induce a differential optical phase shift in the interferometer. Calculations of circumferential strain, polar and equatorial displacement, lowest natural frequency, buckling pressure, and optical pressure sensitivity of such a sensor are presented for thin shells. Sample designs based on these calculations are compared to other fiber-optic hydrophones of similar dimensions and materials. Preliminary designs will be presented.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David A. Brown, Steven L. Garrett, and Donald A. Danielson "Fiber-Optic Oblate Flextensional Hydrophone", Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); https://doi.org/10.1117/12.963038
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