Phase shifted magnetometry adaptive cancellation
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United States of America Patent
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Oct 27, 2020
Grant Date -
Jan 17, 2019
app pub date -
Jul 10, 2018
filing date -
Jul 11, 2017
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Abstract
A system for magnetic detection of an external magnetic field is described. The system includes a controller configured to control components of the system. The controller is configured to control an optical excitation source and a RF excitation source to apply pulse sequences to a magneto-optical defect center material such that in the excitation pulses of a first pair of RF excitation pulses have a first phase difference, the excitation pulses of a second pair of RF excitation pulses have a second phase difference, and the second phase difference is different from the first phase difference. The controller computes a combined magnetometry curve as a function of the RF excitation frequency based on a difference between a measured value of a first light detection signal and a measured value of a second light detection signal. The controller sets the first phase difference and the second phase difference based on the combined magnetometry curve.
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