Automated resonance control for nv magnetometers
US12339332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2024 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Nov 27, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/323
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining an external magnetic field with an NV magnetometer includes recording single resonance signals for determining resonance frequencies by using frequency-modulated microwave radiation emitted onto a sensor material in frequency bands based on a microwave frequency and a carrier frequency, recording a double resonance signal with a dispersive form and a linear range around the resonance frequencies, determining a slope of the linear range as a scalar factor from the double resonance signal, observing a detuning of the resonance frequencies via the double resonance signal with resonant emission of the microwave radiation due to external magnetic field changes, controlling the frequency bands based on the observed detuning so that the frequency bands remain in the range of the resonance frequencies present at the detuning even after the detuning has occurred, and determining the external magnetic field from a distance of the frequency bands and the detuning ΔB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.