Probe beam frequency stabilization in an atomic sensor system
US10451694B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2014 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Aug 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
One example embodiment includes an atomic sensor system. The system includes a vapor cell comprising an alkali metal vapor that precesses in response to a magnetic field. The system also includes a probe laser that generates an optical probe beam that is modulated about a center frequency and which is provided through the vapor cell. A photodetector assembly generates an intensity signal corresponding to a Faraday rotation associated with a detection beam that is associated with the optical probe beam exiting the vapor cell. The system further includes a detection system configured to demodulate the intensity signal at a frequency corresponding to a modulation frequency of the optical probe beam and to generate a feedback signal based on the demodulated intensity signal. The feedback signal is provided to the probe laser to substantially stabilize the center frequency of the optical probe beam based on the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.