Fiber optic planar hydrophone

Details Fiber optic planar hydrophone Fiber optic planar hydrophone

1995-03-20

1996-04-02

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

356345, 356358, H04R 2300

Patent

active

055047203

ABSTRACT:
A plurality of air-backed elongate mandrels are arranged in an planar array such that their longitudinal axes are parallel. A length of a first optical fiber is wound around portions of each mandrel in a first group of the mandrels for exposure to the parameter. The first optical fiber is arranged such that exposing it to the parameter to be sensed causes the length of the first optical fiber to increase and decrease in direct proportion as the parameter increases and decreases. A length of the second optical fiber is wound around a second group of the mandrels for exposure to the parameter. The second optical fiber preferably is arranged such that exposing it to the parameter to be sensed causes the length of the second optical fiber to increase and decrease in inverse proportion as the parameter increases and decreases.

REFERENCES:
patent: 4525818 (1985-06-01), Cielo et al.
patent: 4534222 (1985-08-01), Finch et al.
patent: 4893930 (1990-01-01), Garrett et al.
patent: 5155548 (1992-10-01), Danver et al.
patent: 5212670 (1993-05-01), Brown
patent: 5253222 (1993-10-01), Danver et al.
patent: 5285424 (1994-02-01), Meyer
"Fiber Optic Sensor for Planar Array," Critical Technology, Apr. 1993, pp. 485-496.

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