Fiber Optic Acoustic Sensor.
DEPARTMENT OF THE NAVY WASHINGTON D C
Pagination or Media Count:
This patent application is on an optical fiber acoustical sensor for detecting sound waves in a fluid medium. An optical fiber coil through which a light beam is transmitted is placed in a fluid medium. A sound wave propagating through the fluid medium and incident on the optical fiber coil changes the index of refraction of the optical fiber at the area of incidence. The index change causes a phase shift in the transmitted light which is detectable to denote the presence of the sound wave. Author
- Acoustic Detection and Detectors