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US 12,498,432 B2Granted
Magneto-optical sensor for magnetic field measurement
AssigneeNational Technology & Engineering Solutions of Sandia, LLC
InventorsIsrael Owens, Andrew Charles Biller
Life of this patent
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Abstract
A magneto-optical sensor can be used to measure electrical current with a very narrow pulse width as sensed by the magnetic field in the transmission line region of a pulsed power accelerator. Pulsed power accelerator experimental results agreed remarkably well with the Faraday effect theory, device physical model, and reference electrical current shunt data.
Claims9
A magneto-optical sensor for magnetic field or electrical current measurement, comprising:
- a light source that provides a light beam;
- a first linear polarizer that produces a linearly polarized light beam from the light beam;
- a magneto-optical material that rotates the polarization of the linearly polarized light beam that propagates along an optical axis of the magneto-optical material to provide a rotated linearly polarized light beam whose rotation is dependent upon the strength of a magnetic field generated by an electrical current and applied parallel to the optical axis of the magneto-optical material;
- a second linear polarizer that transmits a light beam dependent upon the rotation of the polarization by the magneto-optical material;
- and
- a photodetector that measures the intensity of the transmitted light beam as a function of time, thereby providing a time-resolved measurement of the strength of the magnetic field.
3 more elements
Dependencies are inferred from the claim text.