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Remotely-interrogated three-axis fiber laser magnetometer

By: Miller, G.A.; Cranch, G.A.; Bartolo, R.E.; Kirkendall, C.K.; Askins, C.G.;

2011 / IEEE / 978-1-4244-9289-3


This item was taken from the IEEE Conference ' Remotely-interrogated three-axis fiber laser magnetometer ' A novel fiber laser magnetometer, designed for seabed-mounted surveillance arrays, is described. The sensor, comprising a metalized fiber laser attached to a nonmagnetic bridge, utilizes the Lorentz force generated in a magnetic field to detect small changes in the earth's field. Three orthogonally mounted sensors measure each component of the field through high-resolution strain measurements, encoded as frequency shifts of the fiber lasers. The sensor node, incorporating three orthogonally mounted magnetic field sensors and a MEMS inclinometer, is qualified to an operating depth of 100 m and connected by a 1 km fiber-optic cable to the interrogation electronics.