Five-Axis Optical Fiber Gradiometer.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A magnetic field gradiometer includes a geometric arrangement of fiber optic sensors through which light from a single frequency laser is transmitted. Having a pair of single-mode optical fibers, each of which are coupled to a magnetostrictive element, each sensor is formed in the manner of a Mach Zehnder interferometer which is oriented to detect the spatial variation in a particular orthogonal component of the magnetic field by phase comparison of the light transmitted through its respective pair of fibers. Patents
- Magnetic and Electric Field Detection and Detectors