Omnidirectional fiber optic hydrophone

Details Omnidirectional fiber optic hydrophone Omnidirectional fiber optic hydrophone

1993-02-09

1993-10-12

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

356345, 73655, 25022714, 25022719, 25022727, G01B 902

Patent

active

052532224

ABSTRACT:
An omnidirectional fiber optic hydrophone includes a concentrically-arranged pair of ring-shaped mandrels mounted between planar upper and base members. Each of the rings is formed of inner and outer annular portions separated by an annular void. Optical fibers wound about the outer circumference of the outer annular portion of the outer ring and about the outer circumference of the inner annular portion of the inner ring communicate with a source of optical energy and with a photodetector to provide signals for measuring acoustic wave-induced deflections of the rings. A plurality of mandrels may be employed in a single hydrophone which may be potted with elastomeric material or free flooded.

REFERENCES:
patent: 2964730 (1960-12-01), Blanchard
patent: 3022487 (1962-02-01), Manns
patent: 4525818 (1985-06-01), Cielo et al.
patent: 4570248 (1986-02-01), Assard
patent: 4799202 (1989-01-01), Assard
patent: 4799752 (1989-01-01), Carome
patent: 4998226 (1991-03-01), Henning et al.

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