Deployable Hydrophone.
Abstract
A hydrophone having an optical fiber wrapped compliant mandrel forming a sensing fiber arm and an optical fiber wrapped metallic mandrel placed within the compliant mandrel having an air space between the two mandrels. The sensing and reference fiber arms are so configured as to form a Michelson interferometer for detecting pressure variations in a surrounding medium. The fiber wrapping of the compliant is such that the structural strength of the compliant mandrel is increased so as to withstand pressures generated at extreme depths to prevent crushing of the compliant mandrel into an air space. Within the center of the metallic mandrel is located a means for coupling the input and output optical fibers of an optical cable to the sensing and reference fiber arms. The area surrounding the coupler within the metallic mandrel is filled with an epoxy material and the entire hydrophone is encapsulated in polyurethane to render the hydrophone watertight but still transparent to the pressure variations in the surrounding medium. (MM)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 25, 1995
- Accession Number
- ADD017646
Entities
People
- Aileen M. Yurek
- Alan B. Tveten
- Anthony Dandridge
Organizations
- United States Department of the Navy