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MAGNETIC FIELD SENSORS, METHODS OF DETECTING A MAGNETIC FIELD, AND RELATED MAGNETICALLY RESPONSIVE LIGHT PROPAGATING COMPONENTS AND OPTICAL DEVICES
MAGNETIC FIELD SENSORS, METHODS OF DETECTING A MAGNETIC FIELD, AND RELATED MAGNETICALLY RESPONSIVE LIGHT PROPAGATING COMPONENTS AND OPTICAL DEVICES
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机译:磁场传感器,检测磁场的方法以及相关的磁响应光传输组件和光学器件
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摘要
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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