Accession Number:

ADD015608

Title:

Low Flow-Noise Conformal Fiber Optic Hydrophone.

Descriptive Note:

Patent, Filed 21 Feb 91, patented 18 Aug 92,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1992-08-18

Pagination or Media Count:

6.0

Abstract:

A fiber-optic hydrophone having a pair of jacketed fiber optic windings formed in a concentric planar spiral configuration in a layer of polyurethane is provided. One of the fiber optic windings has a fiber with a bonded acoustically sensitive jacket thereby increasing its sensitivity to acoustic energy. The second fiber optic winding, the reference winding, has a unbonded jacket enclosing the fiber resulting in reduced sensitivity to acoustic energy. Sensitivity to vibrational energy however, is not reduced. The combining of signals from the pair of fibers provides a vibration-canceled acoustic signal.

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustooptic and Optoacoustic Devices
  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE