Optical magnetometers
US9726733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2015 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | May 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical magnetometer is disclosed. The device includes a cell filled with a substance that has a magnetic moment, such as an alkali metal. First and second light sources, typically diode lasers, illuminate the cell, one optically pumping the cell and one probing the cell. The two diode lasers are set to emit light at two distinct wavelengths, one set to drive a first transition and the other set to drive a second transition within the substance filling the cell. The probe laser light transiting the cell is used to modulate the frequency of the probe laser. The two beams of light are polarized with an ellipticity of at least 0.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.