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Magnetic-field sensing with a single-mode fiber

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Abstract

A fiber-optic magnetic-field sensor is constructed by bonding a single-mode fiber to a nickel cylinder. The magnetic field, by means of the magnetostrictive effect, alters the state of polarization of light in the fiber. A sensitivity of 1.76 × 10−2 rad/m Oe is demonstrated, permitting detection of fields as small as 4.4 × 10−6 Oe/m of fiber.

© 1981 Optical Society of America

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