Planar Fiber-Optic Interferometer Acoustic Sensor.
Patent, Filed 1 Sep 89, patented 19 Feb 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A sensing portion for an interferometric acousto-optic sensor and a sensor using that sensing fiber are disclosed. The sensor fiber has an outer coating of a material having a low bulk modulus. This coating greatly enhances the sensitivity of the sensor fiber. In a preferred embodiment, the material of low bulk modulus embeds the sensor fiber and any included reference fiber. Most preferably, the material having a low bulk modulus is a polymer such as polyurethane. The sensing portions made according to the present invention will usually be incorporated into sensors used for underwater exploration.
- Acoustic Detection and Detectors
- Fiber Optics and Integrated Optics