Abstract:

Fiberoptic interferometric acoustic sensors and accelerometers have been developed for a wide variety of marine and geophysical applications. They offer advantages including compatibility with optical fiber telemetry, light weight, and removal of electronic in the wet-end. This presentation will review sensor designs used in sonar applications. Interrogation and multiplexing schemes using 3x3 couplers and fiber optic Bragg gratings for acoustic and vibration applications will also be presented. [Work supported by ONR and NUWC.]