Magnetic field sensors, methods of detecting a magnetic field, and related magnetically responsive light propagating components and optical devices

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United States of America Patent

PATENT NO 11754644
APP PUB NO 20200348371A1
SERIAL NO

16879575

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Abstract

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A magnetic field sensor comprises a magnetically responsive light propagating component configured to cause a polarization of light propagating inside the component to be rotated in response to an applied magnetic field, wherein the magnetically responsive light propagating component is formed of a bulk material doped with a dopant, the dopant including at least gadolinium, the dopant concentration being at a sufficiently low concentration such that the dopant is uniformly dispersed in the bulk material to provide a high Verdet constant. The magnetic field sensor also comprises a detector, and a polarization-maintaining light input device to couple the light into the magnetically responsive light propagating component. The detector is configured to measure a property of light output from the magnetically responsive light propagating component to determine a change in polarization of the light, the change caused by the presence of a magnetic field.

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Patent Owner(s)

Patent OwnerAddress
UNIVERSITY OF SOUTHAMPTONSOUTHAMPTON HAMPSHIRE SO17 1BJ

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beresna, Martynas Highfield, GB 3 3
Brambilla, Gilberto Highfield, GB 10 16
Ismaeel, Rand Highfield, GB 1 1
Masoudi, Ali Highfield, GB 2 1

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