Daniel F Walters

US Patent:

20210239779, Aug 5, 2021

Filed:

Jan 31, 2021

Appl. No.:

17/163476

Inventors:

- Cambridge MA, US
- Bedford MA, US
- Albuquerque NM, US
Daniel T. WALTERS - Bedford MA, US
Ronald L. WALSWORTH - Cambridge MA, US
Marko LONCAR - Cambridge MA, US
Nicholas Ryan LANGELLIER - Cambridge MA, US

International Classification:

G01R 33/56
G01R 33/00
G01R 33/389

Abstract:

Devices for determining a state of a magnetic field-generating article are provided. In various embodiments, a device comprises: a single crystal diamond having a plurality of NV centers, the single crystal diamond configured to be disposed adjacent to a magnetic field-generating article, and configured to generate a fluorescent signal in response to being illuminated by a light source; a coherent light source configured to generate a light beam directed at the single crystal diamond; a microwave (MW) radiation source configured to irradiate the single crystal diamond with a MW signal; a magnetic field source configured to apply a bias magnetic field to the single crystal diamond; a photosensor configured to collect the fluorescent signal generated by the single crystal diamond; and a computing node operatively coupled to each of the coherent light source, the MW radiation source, the magnetic field source, and the photosensor.