Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1982-06-11
1985-07-16
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367172, 367912, 73855, 350 9629, H04R 1700, G02B 514
Patent
active
045300780
ABSTRACT:
A microbending fiber optic acoustic sensor. A point hydrophone according to a first preferred embodiment of the present Invention includes two opposed pistons which are subjected to an acoustic pressure wave. In response to the pressure wave, the opposed pistons push a pair of deformer plates against an optical fiber to deform the fiber thereby intensity modulating an optical signal passing through the fiber. An extended hydrophone according to a second preferred embodiment of the present Invention includes an optical fiber wound in a helical groove formed in a cylindrical surface. A plurality of parallel axial slots are located in a spaced-apart relationship to each other at positions about the cylindrical surface and are oriented in parallel with the axis of the cylindrical surface. Each axial slot intersects with the helical groove at a plurality of locations and has a depth greater than the depth of the groove. An applied acoustic pressure wave forces the fiber into the axial slots thus deforming the fiber and thereby intensity modulating an optical signal passing through the fiber in response to the acoustic pressure. Depth equalization means are included for each embodiment.
REFERENCES:
patent: 4193130 (1980-03-01), Young et al.
patent: 4296486 (1981-10-01), Vasile
patent: 4313185 (1982-01-01), Chovan
patent: 4342907 (1982-08-01), Macebo et al.
patent: 4390976 (1983-06-01), Eynck
patent: 4449210 (1984-05-01), Myer
Lagakos, Macedo, Litovitz, Mohr, Meister "Fiber Optic Displacement Sensor"; Advances in Ceramics; vol. 2, Ed. by Bendow & Mitra; American Cer. Soc. 1981; pp. 539-544.
Fields, Aswa, Smith, Morrison "Fiber-Optic Hydrophone" Advances in Ceramics; vol. 2, Ed. by Bendow and Mitra; American Cer. Soc. 1981; pp. 529-538.
Fields and Cole; "Fiber Microbend Acoustic Sensor"; Applied Optics; vol. 19; No. 19; Oct. 1980; pp. 3265-3267.
Bucaro and Cole "Acousto-Optic Sensor Development"; Oct. Eascon 1979 Record; pp. 572-580.
Jackson, Intensity Modulated Optical Hydrophone, General Electric 1980 IEEE pp. 42-46.
Bucaro & Cole Acoustic Optic Sensor Naval Research, Washington, D.C. pp. 572-580.
Lagakos Nicholas
Trott W. James
Beers Robert F.
Ellis William T.
Forrest John L.
Moskowitz Nelson
Steinberger Brian S.
LandOfFree
Microbending fiber optic acoustic sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microbending fiber optic acoustic sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microbending fiber optic acoustic sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1739509