We have designed, fabricated, and operated an undersea array of eight fiber-optic vector magnetometers. Each magnetometer consists of three magnetostrictive transducers aligned on orthogonal axes and incorporated in a single Michelson interferometer. During undersea operation, each interferometer exhibited less than 1 μrad/√ Hz phase noise, and the self-noise of each magnetic transducer was less than 0.2 nT/√ Hz at 0.1 Hz. We discuss the design and performance of the optical system including noise mechanisms. We present the results of magnetic measurements of the geomagnetic field and the magnetic tracking of ships
Published in:
Lightwave Technology, Journal of
(Volume:13
,
Issue:
7
)
Date of Publication: Jul 1995