Optical current monitor

Laughlin, Daric Gray; Marchman, Christopher Scott

Title: Optical current monitor

Patent · Tue Aug 03 00:00:00 EDT 2021

OSTI ID:1840313

Laughlin, Daric Gray; Marchman, Christopher Scott

An optical current monitor for detecting a current traveling through conductive material. The optical current monitor comprises a light source for emitting light at an output level; a lens configured to receive the light; Faraday material positioned near the conductive material and configured to receive light that has passed through the lens, thereby producing rotated light; a polarizer configured to polarize the rotated light; a photodetector configured to receive the rotated light and output a signal as a function of the rotated light; and a feedback system. The feedback system is configured to receive the signal from the photodetector and modify the output level of the light source based on the signal so that the signal remains at a reference level when the current is not traveling through the conductive material.

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Research Organization:: Kansas City Plant (KCP), Kansas City, MO (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: NA0002839

Assignee:: Honeywell Federal Manufacturing & Technologies, LLC (Kansas City, MO)

Patent Number(s):: 11,079,412

Application Number:: 16/244,317

OSTI ID:: 1840313

Resource Relation:: Patent File Date: 01/10/2019

Country of Publication:: United States

Language:: English

References (16)

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Fiber optic interferometric circuit and magnetic field sensor Blake, James N. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5644397 US Patent Document 5,644,397	patent	July 1997
Current sensor and method utilizing multiple layers of thin film magneto-optic material and signal processing to make the output independent of system losses Jones, Stephen R.; Power, Terrill G. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4973899 US Patent Document 4,973,899	patent	November 1990
Electric current sensor using the faraday effect Ulmer, Jr., Edward A. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4894608 US Patent Document 4,894,608	patent	January 1990
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Optical sensor assembly for installation on a current carrying cable Harlev, Joseph Yossi; Johnson, Leonard; Veazey, Rhad https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9134344 US Patent Document 9,134,344	patent	September 2015
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